MARKING
The signal transmission rate of personal computer peripheral devices and digital devices as represented by USB2.0 devices is being
increased year by year, and countermeasures against ESD are critical in high-frequency bands. We have developed Type KVA
Surge Absorber to protect the circuits of various electronic devices sensitive to ESD.
Since the surge absorber has a low capacitance of 0.08 pF, it is applicable to high-speed signal lines.
The ecology design of Type KVA is environmentally friendly because of Lead-free and Halogen-free.
The product is suitable for elimination of ESD on high-speed signal lines that may be affected by signal waveform deformation.
(USB2.0, USB3.0, IEEE1394, HDMI interfaces, SCSI ports, antenna lines, etc.)
1. Usable on high-speed signal lines
2. Low capacitance (size 1005 : 0.06pF typ.)
3. Large ESD endurance and high insulation resistance
4. No polarity. Protection of circuit against ESD from both directions
5. Ultra-small size : 1005 (1.0 × 0.5 × 0.35 mm), 1608 (1.6 × 0.8 × 0.5 mm)
6. Suitable for automatic mounting by chip placer
7. Precise dimensions allows high-density mounting and symmetrical construction of terminal provide “Self-Alignment”.
8. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C
9. High accuracy carrier tape by using pressed pocket ensures excellent mounting.
10. Lead-free and RoHS Compliant
Item Ratings
Category Temperature Range – 40~+125°C
Rated Voltage 24 VDC
Trigger Voltage 1000V max. (650V typ.)
Clamp Voltage 200V max. (100V typ.)
Capacitance size 1005:0.1pF max. (0.06pF typ.)
size 1608:0.2pF max. (0.08pF typ.)
KVA 2402 102 NA 29
Type code
Rated voltage code Trigger voltage code Package style code
Case code
Surge Absorber
(for ESD Elimination)
Code : Rated voltage
2402 : 24V
Code : Trigger voltage
102 : 1000V
Packaging type
NA : φ180 Reel
Code : Case size
07 : 1.0 × 0.5
29 : 1.6 × 0.8
〔size 1005〕 〔size 1608〕
Main body:Alumina ceramic Terminal:Tin plating (mm)
Case size Case code L W T max P
1005 07 1.00±0.05 0.50±0.05
0.35 0.20±0.1
1608 29 1.60±0.1 0.80±0.1
0.50 0.30±0.2
Code Rated voltage Trigger voltage
24 VDC 1000 V max.
FEATURES
DIMENSIONS
RATING
ORDERING INFORMATION
OUTLINE ( TYPE KVA )
APPRICATION
P
T
L
W
P
W
W
T
P P
L W
1
Name Material
Micro gap Copper
Body Alumina ceramic
Protective coat Silicone resin
Terminal Tin plating
(mm)
Size 1005 Size 1608
a 0.4 1.0
b 0.5 1.2
c 0.6 1.0
Glass epoxy on one side
Board thickness:1.6 mm
Copper layer:35m
When mounted in parallel with the elements to be protected, such as ICs, between the
elements and GND, Type KVA suppresses ESD applied to the elements and prevents
malfunction and breaking.
Case size Size a
1005 0.6
1608 1.2
CONSTRUCTION
STANDARD TEST BOARD
RECOMMENDED PAD DIMENSIONS
100 mm
33 mm
5 mm
a mm
STAFIC SUPPRESSION -Example of ESD Elimination-
Surge Absorber absorbs and suppresses static electricity.
(mm)
Original ESD waveform at 1 kV
-200
0
200
400
600
800
1000
1200
0 20 40 60 80 100 120 140 160 180 200
Times(ns)
Vo
lts(
V)
Absorbed ESD waveform at 1 kV when KVA is used
-200
0
200
400
600
800
1000
1200
0 20 40 60 80 100 120 140 160 180 200
Times(ns)
Volts(
V)
Static Electricity
Simulator
Oscillo-
scope
IC
(1MΩ)
Static Electricity
Simulator
KVA Oscillo-
scope
IC
(1MΩ)
Body
Protective coating
Micro gap
Terminal
2
No. Item Performance Test method
1 Trigger voltage Shall not exceed 1000 V. Contact discharging conforming to IEC61000-4-2
Tester capacity:150 pF/Resistance:330 Ω
2 Clamp voltage Shall not exceed 200 V. Contact discharging conforming to IEC61000-4-2
Tester capacity:150 pF/Resistance:330 Ω Test voltage:8 kV (level 4)
3 Capacitance size 1005:Shall not exceed 0.1pF.
size 1608:Shall not exceed 0.2pF. Measuring frequency :1 MHz Measuring voltage:1 V
4 Leakage current Shall not exceed 1 nA. Test voltage: 6V
5 Insulation resistance Shall exceed 1 MΩ. Resistance between terminals.
6
Electrode strength (Bending)
No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Board supporting width:90 mm Bending speed:Approx. 0.5 mm/sec. Duration:30 sec. Bending:3 mm
7
Shear test No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Applied force:size 1005 10 N (1.02 kgf) size 1608 20 N (2.04 kgf)
Duration:10 sec. Tool:R0.5 Direction of the press:side face
8
Substrate bending test No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Supporting dimension:size 1005 0.5 mm size 1608 0.8 mm
Applied force:size 1005 5 N (0.51 kgf) size 1608 10 N (1.02 kgf)
Tool:R0.5 Direction of the press:thickness direction of product.
9
Solderability (Solder Wetting time)
Solder Wetting time : within 3sec. Solder:Sn–3Ag–0.5Cu Temperature:245 ± 3 meniscograph method
Solder:JISZ3282 H60A, H60S, H63A Temperature:230 ± 2 meniscograph method
10
Solderability (new uniform coating of solder)
The dipping surface of the terminals shall be covered more than 95% with new solder.
Solder:Sn–3Ag–0.5Cu Temperature:245 ± 3 Dipping:3sec.
Solder:JISZ3282 H60A, H60S, H63A Temperature:230 ± 2 Dipping:3sec.
11
Resistance to soldering heat
Marking shall be legible. No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Dipping (1 cycle) Preconditioning:100 ~ 150, 60 sec. Temperature:265 ± 3/6 ~ 7 sec.
Reflow soldering (2 cycles) Preconditioning:1 ~ 2 min, 180 or less Peak:250 ± 5°C, 5 sec. Holding:230 ~ 250, 30 ~ 40 sec. Cooling:more than 2 min.
Manual soldering Temperature:350 ± 10 Duration:3 ~ 4 sec. Measure after 1 hour left under room temp. and humidity.
12
Solvent resistance Marking shall be legible. No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Dipping rinse Solvent:Isopropyl alcohol Duration:90 sec.
13
ESD endurance No mechanical damage. The resistance between terminals shall be 1 MΩ or more, and the trigger voltage shall be met.
Conforming to IEC61000-4-2 Tester capacity:150pF / Resistance : 330 Ω Test voltage:It depends below.(level 4) 1000 cycles
Case size Contact discharge Air discharge
1005 8kV 8kV
1608 8kV 15kV
14 Vibration No mechanical damage.
Shall meet specification of trigger voltage and the insulation resistance.
Frequency range:10 ~ 55 ~ 10 Hz/min. Vibration amplitude:1.5 mm. Duration:2 hours in each of XYZ directions (total : 6 hours)
15 Shock No mechanical damage.
Shall meet specification of trigger voltage and the insulation resistance..
Peak value:490 m/s2 (50 G)
Duration:11 msec. 6 aspects × 3 times (total : 18 times)
16
Thermal shock No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
-55 ± 3°C:30 min. Room temperature:2 ~ 3 min or less 125 ± 2°C:30 min. Room temperature:2 ~ 3 min or less Repeat above step for 10 cycles.
17
Moisture resistance No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Leaving Duration : 1000 h
18 Load life No mechanical damage.
Shall meet specification of trigger voltage and the insulation resistance.
Temperature : 85 ± 2°C Applied : 24V (Rated voltage) Duration : 1000 hours
19
Accelerated damp heat steady state
No mechanical damage. Shall meet specification of trigger voltage and the insulation resistance.
Temperature:85 ± 3 Humidity:85 ± 5%RH Applied:24V(rated voltage) Duration:1000 hours
20 Stability No mechanical damage.
Shall meet specification of trigger voltage and the insulation resistance.
Temperature:125 ± 2 Leaving Duration:1000 hours
PERFORMANCE
3
Application Notes for Surge Absorber
1. Circuit Design
Type KVA Surge Absorber is a part for protection from static
electricity and cannot be used for protection from lightning surge.
Before using Type KVA Surge Absorber, sufficiently examine its
electrical characteristics and the circuit conditions to be
mounted.
(1) Type KVA should always be operated below the rated
voltage.
(2) Use Type KVA under the condition of category temperature.
Type KVA should be selected by determining the operating
conditions that will occur after final assembly, or estimating
potential abnormalities through cycle testing.
2. Assembly and Mounting
During the entire assembly process, observe Type KVA body
temperature and the heating time specified in the performance
table. In addition, observe the following items :
(1) Mounting and adjusting with soldering irons are not
recommendable since temperature and time control is
difficult.
In case of emergency for using soldering irons, be sure to
observe the conditions specified in the performance table.
(2) Type KVA body should not have direct contact with a
soldering iron.
(3) Once Type KVA mounted on the board, they should never
be remounted on boards or substrates.
(4) During mounting, be careful not to apply any excessive
mechanical stresses to Type KVA.
3. Solvents
For cleaning of Type KVA, immersion in isopropyl alcohol for 90
seconds (at 20 ~ 30°C liquid temp.) will not be damaged.
If organic solvents (Pine AlphaTM, Techno CareTM, Clean
ThroughTM, etc.) will be applied to Type KVA, be sure to
preliminarily check that the solvent will not damage the Type
KVA.
4. Caution During Usage
Type KVA should never be touched in use.
5. Environmental Conditions
(1) Type KVA should not be operated in acid or alkali corrosive
atmosphere.
(2) Type KVA should not be vibrated, shocked, or pressed
excessively.
(3) Type KVA should not be operated in a flammable or explosive
atmosphere.
(4) After mounting Type KVA on a board, covering Fuses with
resin may affect to the electric characteristics of Type KVA.
Please be sure to evaluate it in advance.
6. Emergency In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
7. Storage (1) Type KVA should be stored at room temperature (-10 ~
+40) without direct sunlight but not in corrosive atmosphere
such as H2S(hydrogen sulfide)or SO2(sulfur dioxide).
Direct sunlight may cause decolorization and deformation of
the exterior and taping.
Also, there is a fear that solderability will be remarkably lower
in high humidity.
(2) If the products are stored for an extended period of time,
please contact Matsuo Sales Department for recommendation.
The longer storage term causes
packages and tapings to worsen. If the products are stored
for longer term, please contact Matsuo Sales Department
for advice.
(3) The products in taping, package, or box should not begiven
any kind of physical pressure. Deformation of taping
or package may affect automatic mounting.
8. Disposal When Type KVA are disposed of as waste or “scrap”, they should
be treated as “industrial waste”. Type KVA contain various kinds
of metals and resins.
9. Samples
Type KVA received as samples should not be used in any
products or devices in the market. Samples are provided for a
particular purpose such as configuration, confirmation of electrical
characteristics, etc.
Please feel free to ask our sales department for more information on the Surge Absorber.
Overseas Sales Dep: 5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head Office: 5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL: http://www.ncc-matsuo.co.jp/
The specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm the specifications prior to use.
R
MATSUOMATSUO ELECTRIC CO., LTD.
4
Type KAH micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electronic circuit
around battery, etc. because the demand for high capacity batteries is increasing.
Further miniaturization and low profile with extended rated range can be used for wider application.
Also, the ecology design of Type KAH is friendly to environment due to complete lead free.
1. 5-face terminals structure ensure superior performance of shear strength (10 N for 5-face terminals, 5 N for conventional type).
2. With new development of micro fuse using our original production method, Type KAH, size 1005 can ensure same fusing
characteristics of size 1608 of our Type KAB.
3. Complete lead-free Type KAH is designed friendly to environment.
4. UL file number E170721. (UL248-1 & 14)
5. Surface temperature rise is 75°C or less when applying rated current. This offers less influence on the peripheral units.
6. 1005 is the Ultra-small size. (1.0 x 0.5 x 0.35 mm)
7. Suitable for automatic mounting
8. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”.
9. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C
10. High accuracy carrier tape by using pressed pocket paper ensures excellent mounting.
Item Ratings
Category Temperature Range – 40~+125°C
Rated Current 0.2–0.25–0.315–0.4–0.5–0.63–0.8–1.0–1.25–1.6–2.0–2.5A
Rated Voltage 24 VDC
Voltage Drop Refer to CATALOG NUMBERS AND RATING
Insulation Resistance 1000 MΩ or more
Fusing Characteristics Fusing within 1 minute if the current is 200% of rated current.
Clearing Characteristics Breaking voltage : 24 V
Breaking current : 50 A
KAH 2402 102 NA 07
Tyoe Code RV Code Rated current Code Rated current Code Packaging type Code Case size
KAH
2402
24V
201
251
321
401
501
631
0.2 A
0.25 A
0.315 A
0.4 A
0.5 A
0.63 A
801
102
132
162
202
252
0.8 A
1.0 A
1.25 A
1.6 A
2.0 A
2.5 A
NA
180 Reel
07
1.0×0.5
Catalog number Case size Rated current
A
Internal resistance mΩ
(Typical)
Voltage drop mV
(Max.)
Rated voltage VDC
Breaking current
A
KAH 2402 20107 1.0 × 0.5 0.2 1148 350
24 50
KAH 2402 25107 1.0 × 0.5 0.25 797 300
KAH 2402 32107 1.0 × 0.5 0.315 548 260
KAH 2402 40107 1.0 × 0.5 0.4 372 225
KAH 2402 50107 1.0 × 0.5 0.5 261 195
KAH 2402 63107 1.0 × 0.5 0.63 181 170
KAH 2402 80107 1.0 × 0.5 0.8 125 150
KAH 2402 10207 1.0 × 0.5 1.0 90 135
KAH 2402 13207 1.0 × 0.5 1.25 65 120
KAH 2402 16207 1.0 × 0.5 1.6 46 110
KAH 2402 20207 1.0 × 0.5 2.0 35 110
KAH 2402 25207 1.0 × 0.5 2.5 27 110
For the taping type,the packaging code “NA” will be sntered in
Catalog numbers are approved by UL and cUL. (File No. E170721)
FEATURES
CATALOG NUMBERS AND RATING
November, 2010
RATING
ORDERING INFORMATION
TYPE KAH
1
MARKING
CONSTRUCTION
Main body:Alumina ceramiv Terminal:Tin plating (mm)
Case size Case code L W T max P
1005 07 1.00±0.05 0.50±0.05 0.35 0.20±0.10
Code : Rated current Code : Rated current
P : 0.20 A V : 0.80 A
Q : 0.25 A 1 : 1.00 A
R : 0.315 A W : 1.25 A
S : 0.40 A X : 1.60 A
T : 0.50 A 2 : 2.00 A
U : 0.63 A Y : 2.50 A
Name Mate
Protective coating Silicone resin
Fuse element Copper alloy
Body Alumina ceramic
Terminal Tin painting
(mm)
Size 1005
a 0.4
b 0.5
c 0.6
Glass epoxy on one side
Board thickness:1.6 mm
Copper layer:35m
DIMENSIONS
STANDARD TEST BOARD
RECOMMENDED PAD DIMENSIONS
P
L
W
T
T
Body
Fuse element Protective
coating
c
Terminal
100 mm
33 mm
5 mm
0.6 mm
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply rated current.
3 Clearing characteristics Arc shall not be continued.
Marking shall be legible.
Breaking voltage:24 V
Breaking current:50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG
NUMBERS AND RATING. Apply rated current.
5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current.
(Ambient temperature:10–30
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case
(alumina ceramic)
7 Electrode strength
(Bending)
No mechanical damage.
Resistance change after the test shall be within ± 20%.
Board supporting width:90 mm
Bending speed:Approx. 0.5 mm/sec.
Duration:30 sec.
Bending:3 mm
8 Shear test No mechanical damage.
Resistance change after the test shall be within ± 20%.
Applied force:10 N (1.02 kgf)
Duration:10 sec.
Tool:R0.5
Direction of the press:side face
9 Substrate bending test No mechanical damage.
Resistance change after the test shall be within ± 20%.
Supporting dimension:0.5 mm
Applied force:5 N (0.51 kgf)
Tool:R0.5
Direction of the press:thickness direction of product.
10 Solderability
(Solder Wetting time) Solder Wetting time : within 3sec.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C
meniscograph method
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C
meniscograph method
11 Solderability
(new uniform coating of solder) The dipped surface of the terminals shall be covered
more than 95% with new solder.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C
Dipping : 3 sec.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C
Dipping : 3 sec.
12 Resistance to soldering heat
Marking shall be legible.
No mechanical damage.
Resistance change after the test shall be within ± 20%.
Dipping (1 cycle)
Preconditioning:100 to 150°C, 60 sec.
Temperature:265 ± 3°C/6–7 sec.
Reflow soldering (2 cycles)
Preconditioning:1–2 min, 180°C or less
Peak:250 ± 5°C, 5 sec.
Holding:230–250°C, 30–40 sec.
Cooling:more than 2 min.
Manual soldering
Temperature:350 ± 10°C
Duration:3–4 sec.
Measure after 1 hour left under room temp. and
humidity.
13 Solvent resistance
Marking shall be legible.
No mechanical damage.
Resistance change after the test shall be within ± 20%.
Dipping rinse
Solvent:Isopropyl alcohol
Duration:90 sec.
14 Ultrasonic Cleaning
Marking shall be legible.
No mechanical damage.
Resistance change after the test shall be within ± 20%.
Ultrasonic : 20mW/cm2 28kHz
Solvent:Isopropyl alcohol
Duration:60 sec.
15 Vibration No mechanical damage.
Resistance change after the test shall be within ± 20%.
Frequency range:10–55–10 Hz/min
Vibration amplitude:1.5 mm
Duration:2 hours in each of XYZ directions
(total:6 hours)
16 Shock No mechanical damage.
Resistance change after the test shall be within ± 20%.
Peak value:490 m/s2 (50 G)
Duration:11 m sec.
6 aspects 3 times (total:18 times)
17 Thermal shock No mechanical damage.
Resistance change after the test shall be within ± 20%.
–55 ± 3°C : 30 min.
Room temperature:2–3 min or less
125 ± 230 min
Room temperature:2–3 min or less
Repeat above step for 10 cycles.
18 Atomizing salt water No mechanical damage.
Resistance change after the test shall be within ± 20%.
Temperature : 35 ± 2°C Concentration (weight ratio) : 5 ± 1%
Duration : 24 hours
19 Moisture resistance No mechanical damage.
Resistance change after the test shall be within ± 20%.
Temperature:85 ± 3
Humidity:85 ± 5% RH
Duration:1000 hours
20 Load life No mechanical damage.
Resistance change after the test shall be within ± 20%.
Temperature:85 ± 2
Applied current:Rated current 70%
Duration:1000 hours
21 Stability No mechanical damage.
Resistance change after the test shall be within ± 20%.
Temperature:125 ± 2
Duration:1000 hours
22 Accelerated damp heat steady
state
No mechanical damage.
Resistance change after the test shall be within ± 20%.
Temperature:85 ± 3°C
Humidity:85 ± 5% RH
Applied current : Rated current 70%
Duration:1000 hours
PERFORMANCE
3
KAH 2402 102NA07
KAH 2402 102NA07
FUSING CHARACTERISTICS
I2T – T CHARACTERISTICS
DISTRIBUTION OF FUSING CHARACTERISTICS
DISTRIBUTION OF FUSING TIME
0.0001
0.001
0.01
0.1
1
10
100
1000
0.1 1 10 100
Applied current (A)
Fusin
g tim
e (
sec)
0.0001
0.001
0.01
0.1
1
0 20 40 60 80 100
200% of rated current is
400% of rated current is
applied
Number of pcs
Fus
ing
tim
e (s
ec)
0.20A0.25A0.315A
0.50A0.40A
0.63A0.80A1.00A1.25A1.60A2.00A2.50A
0.00001
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (sec)
Jo
ule
in
teg
ral (A
2s)
0.2
0A
0.2
5A
0.3
15A
0.5
0A
0.4
0A
0.6
3A
0.8
0A
1.0
0A
1.2
5A
1.6
0A
2.0
0A
2.5
0A
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fu
sin
g t
ime
(se
c)
4
Fig.B
Determine the rated value of the microfuse, and select the correct microfuse for your circuit. If you select the correct microfuse,
safety of your circuit can be ensured.
How to determine the rated value of the microfuse is described below :
Flow for fuse selection
1. Measurement of circuit values using actual device
Measure the circuit values, such as operating current of the circuit.
2. Calculation from operating current
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable
fuse.
3. Calculation from overload current
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
4. Calculation from inrush current
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine the rated value.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1.Measurement of circuit values using actual device
Before determining the rated value of the fuse, preliminarily measure the following using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine
the number of inrush current applied.
1–4 Category temperature
Measure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE KAH
<Fuse selection>
Effective operating current : 1.2 A
Effective overload current : 6.0 A
Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 6.0 A)
Numbers to withstand inrush current : 100,000 times
Category temperature : 85°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.
Example : Effective operating current = 1.2 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.
②Rated derating factor
Rated derating factor = 0.75
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.
Rated current of fuse ≧ Operating current / (① ②) ... Formula 1
Example : Category temperature = 85°C, Operating current = 1.2 A
①Temperature derating factor = 0.90 (Refer to Fig. B.)
②Rated derating factor = 0.75
Calculation using Formula 1 :
Rated current ≧ 1.2/ (0.90 0.75) = 1.78 A
The above calculation result shows that the fuse with rated current of 1.78 A or more should be selected for this circuit.
Type KAH, with rated current of 2.0 A or more can be selected.
Fig. A : Inrush current waveform
DETERMINATION OF RATED VALUE AND SELECTION OF MICROFUSE(TYPE KAH,SIZE 1005)
1ms
6.0 A
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
-50 -25 0 25 50 75 100 125
Temperature ()
Dera
ting facto
r (%
)
5
3. Calculation from overload current
3–1 Measurement of overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
Example : Effective overload current = 6.0 A
3–2 Calculation from overload current
Determine the rated current so that the overload current can be 2 times larger than the rated current.
Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≦ Overload current /2.0 ... Formula 2
Example : Overload current = 6.0 A
Use Formula 2 to calculate the rated current.
Rated current ≦ 6.0/2.0 = 3.0 A
The above calculation result shows that the fuse with rated current of 3.0 A or less should be selected for this circuit.
Type KAH, with rated current of 2.5 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush
current of the actual circuit.
4–2 Creation of approximate waveform
Generally, the waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of I2t of inrush current
Calculate I2t (Joule integral) of the approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 6.0 A,
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation
I2t of rush current = 1/3 Im2 t ... Formula 3
(Im : Peak value, t : Pulse applying time)
Use Formula 3 to calculate the I2t of the rush current :
I2t = 1/3 6 6 0.001 = 0.012 (A
2s)
* Following formula is generally used for calculation of 2t as i(t) equal to curre nt.
2 t=∫0ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTERGRAL VALUES FOR EACH WAVEFORM
1ms
6A
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximae waveform
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
m
t 0 1
2
t
m
0
0 t
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 τ 1
2
1 2 t + (1-2) 2 t
1
3
Table A
6
4–4 Search of load ratio
①Set up the number of cycles to withstand. (generally
100,000 times)
②Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
Determine the load ratio using Fig. D.
If the rated current is 0.2 to 2.0 A : 30% or less
If the rated current is 2.5 A : 26% or less
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard I2t for the fuse to be
used.
Standard I2t of fuse > (I
2t of inrush current / load ratio) ..........
..........Formula 4
Example : I2t of pulse = 0.012 A
2s,
Pulse applied = 1 ms, Required load ratio = 30% (at 0.2 to 2.0 A
Fuse) or 26% (at 2.5 A Fuse) :
Example of 2.0 A Fuse : Use Formula 4 to calculate the
standard I2t of fuse.
Standard I2t of fuse > 0.012/0.3 = 0.04 (A
2s)
The standard I2t of the fuse should be 0.04 (A
2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 0.04 A2s (vertical axis) from
Fig. E (refer to the arrow shown on Fig. E).
Select a fuse whose curve is above the intersection. Type
KAH, with rated current of 2.0 A or more should be selected.
5. Final determination of rated value
Determine the rated current of the microfuse. The rated
current should meet all the above calculation results.
Example : Rated current of 2.0 A and 2.5 A meet the all
requirements
6. Operation check using actual device
After selecting the rating, confirm if the device works properly
under the pre-determined conditions.
Fig. D
Fig. E
PULSE RESISTANCE CHARACTERISTICS
JOULE INTEGRAL VS. FUSING TIME
10
100
1000
10000
100000
1000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Num
bers
of
puls
e r
esis
tance (
cycle
)
0.2A to 2.0 A
2.5A
0.20A0.25A0.315A
0.50A0.40A
0.63A0.80A1.00A1.25A1.60A2.00A2.50A
0.00001
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (s)
Joule
inte
gra
l (A
2s)
7
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications. According to item 2,2-2 Fuse will explode during test. During fusing tests, please
in page 5. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid or alkali corrosive
(4) When Micro Fuse are used in inrush current applications, atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight but not in corrosive atmosphere
(1) Mounting and adjusting with soldering irons are not such as H2S(hydrogen sulfide)or SO2(sulfur dioxide).
recommendable since temperature and time control is Direct sunlight may cause decolorization and deformation of
difficult. the exterior and taping.
In case of emergency for using soldering irons, be sure to Also, there is a fear that solderability will be remarkably
observe the conditions specified in the performance table. lower in high humidity.
(2) Micro Fuse body should not have direct contact with a (2) If the products are stored for an extended period of time,
soldering iron. please contact Matsuo Sales Department for
(3) Once Micro Fuse mounted on the board, they should never recommendation. The longer storage term causes
be remounted on boards or substrates. packages and tapings to worsen. If the products are stored
(4) During mounting, be careful not to apply any excessive for longer term, please contact Matsuo Sales Department
mechanical stresses to the Micro Fuse. for advice.
(3) The products in taping, package, or box should not be
3. Solvents given any kind of physical pressure. Deformation of taping
For cleaning of Micro Fuse, immersion in isopropyl alcohol or package may affect automatic mounting.
for 90 seconds (at 20 ~ 30°C liquid temp.) will not be
damaged. 9. Disposal If organic solvents (Pine Alpha
TM, Techno Care
TM, Clean When Micro Fuse are disposed of as waste or “scrap”, they
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure should be treated as “industrial waste”. Micro Fuse contain
to preliminarily check that the solvent will not damage the various kinds of metals and resins.
Micro Fuse.
10. Samples4. Ultrasonic Cleaning Micro Fuse received as samples should not be used in any
Ultrasonic cleaning is not recommended for Micro Fuse. products or devices in the market. Samples are provided
This may cause damage to the Micro Fuse such as broken for a particular purpose such as configuration, confirmation
terminals which results in electrical characteristics effects, of electrical characteristics, etc.
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
8
Type KAB micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electronic circuit around battery, etc. because the demand for high capacity batteries is increasing.
Further miniaturization and low profile with extended rated range can be used for wider application. Also, the ecology design of Type KAB is friendly to environment due to complete lead free. 1. New type fuses developed by our original technology. They show no variation in fusing characteristics and have excellent fastblow
capability.
2. Surface temperature rise is 75°C or less when applying rated current. This offers less influence on the peripheral units.
3. The fuses come in ultrasmall size 1608 (1.6×0.8×0.45 mm) and 2012 (2.0×1.25×0.5 mm).
4. Suitable for automatic mounting
5. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”.
6. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C
7. High accuracy carrier tape by using pressed pocket paper ensures excellent mounting.
8. LEAD-FREE and RoHS Compliant
ORDERING INFORMATION
RATING
K A B 3 2 0 2 1 0 2 N A 2 9 0 1 0
FEATURES
TYPE KAB
Item
Category Temperature Range
1.6×0.8 0.2-0.25-0.315-0.4-0.5-0.63-0.8-1.0-1.25-1.6-2.0-2.5-3.15-4.0-5.0-6.3A
2.0×1.25 0.2-0.25-0.315-0.4-0.5-0.63-0.8-1.0-1.25-1.6-2.0-2.5-3.15-4.0-5.0A
Rated Voltage
Voltage Drop
Insulation Resistance
(between Terminals and Case)
Fusing Characteristics
Breaking voltage:24V, 32V, 50VClearing Characteristics
Breaking current:50A
24VDC, 32VDC, 50VDC
Rating
-40 ~ +125
Fusing within 1 min if the current is 200% of rated current.
Rated Current
Refer to CATALOG NUMBERS AND RATING
1000MΩ or more
Type Code Voltage Code Rated current Code Rated current Code Packaging type Code Case size Special product code
KAB 2402 24V 201 0.2 A 132 1.25 A NA φ180 Real 29 1.6 × 0.8
3202 32V 251 0.25 A 162 1.6 A 31 2.0 × 1.25
5002 50V 321 0.315 A 202 2.0 A
401 0.4 A 252 2.5 A
501 0.5 A 322 3.15 A
631 0.63 A 402 4.0 A
801 0.8 A 502 5.0 A
102 1.0 A 632 6.3 A
※ The special product code 010 indicates lead-free terminals.
010※
1
CONSTRUCTION
CATALOG NUMBERS AND RATING
MARKING
RECOMMENDED PAD DIMENSIONS
STANDARD TEST BOARD
DIMENSIONS
100 mm
33 mm
5 mm
a mm
1
WL
PP
T
P P
Code : Rated current Code : Rated current
P : 0.2 A W : 1.25 A
Q : 0.25 A X : 1.6 A
R : 0.315A 2 : 2.0 A
S : 0.4 A Y : 2.5 A
T : 0.5 A 3 : 3.15 A
U : 0.63 A 4 : 4.0 A
V : 0.8 A 5 : 5.0 A
1 : 1.0 A 6 : 6.3 A
Name Material
Fuse element Copper alloy
Body Alumina ceramic
Protective coating Silicone resin
Terminal Tin plating
Fuse
element
Protective coating
Terminal
Body
Size 1608 Size 2012
a 1.0 1.4
b 1.2 1.65
c 1.0 1.2
(mm)
Case size Size a
1608 1.2
2012 1.5
(mm)
Glass epoxy on one side
Copper layer : 35mBoard thickness : 1.6mm
Main Body : Alumina ceramic
Terminal:Tin plating (mm)
Case size Case code L W T max. P
1608 29 1.6 ± 0.1 0.8 ± 0.1 0.45 0.3 ± 0.2
2012 31 2.0 ± 0.1 1.25 ± 0.1 0.5 0.3 ± 0.2
November, 2010
Catalog number Case sizeRated current
A
Internal resistance
mΩ
(Typical)
Voltage drop
mV
(Max.)
Rated voltage
VDC
Breaking current
A
KAB 5002 201 29 010※ 1.6×0.8 0.2 1260 405
KAB 5002 251 29 010 1.6×0.8 0.25 825 355
KAB 5002 321 29 010 1.6×0.8 0.315 530 275
KAB 5002 401 29 010 1.6×0.8 0.4 320 180
KAB 5002 501 29 010 1.6×0.8 0.5 210 140
KAB 3202 631 29 010 1.6×0.8 0.63 135 115
KAB 3202 801 29 010 1.6×0.8 0.8 100 110
KAB 3202 102 29 010 1.6×0.8 1.0 80 110
KAB 3202 132 29 010 1.6×0.8 1.25 60 110
KAB 3202 162 29 010 1.6×0.8 1.6 46 110
KAB 3202 202 29 010 1.6×0.8 2.0 35 110
KAB 2402 252 29 010 1.6×0.8 2.5 27 110
KAB 2402 322 29 010 1.6×0.8 3.15 20 110
KAB 2402 402 29 010 1.6×0.8 4.0 15 110
KAB 2402 502 29 010 1.6×0.8 5.0 13 110
KAB 2402 632 29 010 1.6×0.8 6.3 10 110
KAB 2402 201 31 010 2.0×1.25 0.2 1740 480
KAB 2402 251 31 010 2.0×1.25 0.25 1280 475
KAB 2402 321 31 010 2.0×1.25 0.315 800 375
KAB 2402 401 31 010 2.0×1.25 0.4 440 255
KAB 2402 501 31 010 2.0×1.25 0.5 260 170
KAB 2402 631 31 010 2.0×1.25 0.63 175 150
KAB 2402 801 31 010 2.0×1.25 0.8 120 145
KAB 2402 102 31 010 2.0×1.25 1.0 90 135
KAB 2402 132 31 010 2.0×1.25 1.25 67 130
KAB 2402 162 31 010 2.0×1.25 1.6 48 120
KAB 2402 202 31 010 2.0×1.25 2.0 36 115
KAB 2402 252 31 010 2.0×1.25 2.5 28 110
KAB 2402 322 31 010 2.0×1.25 3.15 21 105
KAB 2402 402 31 010 2.0×1.25 4.0 16 95
KAB 2402 502 31 010 2.0×1.25 5.0 10 60
※For taping specification, the package code (NA) is entered . One reel contains 5000 pcs.
UL/cUL approved File No.E17021
50
50
24 50
24
32
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75°C. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply rated current.
3 Clearing characteristics Arc shall not be continued. Marking shall be legible.
Breaking voltage : Rated voltage Breaking current : 50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Apply rated current.
5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current. (Ambient temperature : 10 ~ 30°C)
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case (alumina ceramic)
7 Electrode strength
(Bending)
No mechanical damage. Resistance change after the test shall be within ± 20%
Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec Duration : 30 sec Bending : 3 mm
8 Shear test No mechanical damage. Resistance change after the test shall be within ± 20%
Applied force : 20 N (2.04 kgf) Duration : 10 sec Tool : R0.5 Direction of the press : side face
9 Substrate bending test No mechanical damage. Resistance change after the test shall be within ± 20%
Supporting dimension : 1.2 mm (size 2012) 0.8 mm (size 1608)
Applied force : 10 N (1.02 kgf) Tool : R0.5 Direction of the press : thickness direction of product
10 Solderability
(Solder Wetting time) Solder Wetting time : within 3sec.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C meniscograph method
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C meniscograph method
11 Solderability
(new uniform coating of solder)
The dipping surface of the terminals shall be covered
more than 95% with new solder.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C Dipping : 3 sec.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C Dipping : 3 sec.
12 Resistance to soldering heat Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%
Dipping (1 cycle) Preconditioning : 100 ~ 150°C, 60 sec Temperature : 265 ± 3°C /6 ~ 7 sec
Reflow soldering (2 cycles) Preconditioning : 1 ~ 2 min, 180°C or less Peak : 260°C max, 5 sec Holding : 230 ~ 250°C, 30 ~ 40 sec Cooling : more than 2 min
Manual soldering Temperature : 400 ± 10°C Duration : 3 ~ 4 sec Measure after 1 hour left under room temp. and humidity.
13 Solvent resistance Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%
Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec
14 Ultrasonic Cleaning Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%
Ultrasonic : 20mW/cm2 28kHz
Solvent : Isopropyl alcohol Duration : 60 sec
15 Vibration No mechanical damage. Resistance change after the test shall be within ± 20%
Frequency range : 10 ~ 55 ~ 10 Hz/min Vibration amplitude : 1.5 mm Duration : 2 hours in each of XYZ directions (total : 6 hours)
16 Shock No mechanical damage. Resistance change after the test shall be within ± 20%
Peak value : 490 m/s2 (50 G)
Duration : 11 m sec 6 aspects × 3 times (total : 18 times)
17 Thermal shock No mechanical damage. Resistance change after the test shall be within ± 20%
–55 ± 3°C : 30 min Room temperature : 2 ~ 3 min or les 125 ± 2°C : 30 min Room temperature : 2 ~ 3 min or less Repeat above step for 10 cycles.
18 Atomizing salt water No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 35 ± 2°C Concentration (weight ratio) : 5 ± 1% Duration : 24 hours
19 Moisture resistance No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Duration : 1000 hours
20 Load life No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 2°C Applied current : Rated current × 70% Duration : 1000 hours
21 Stability No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 125 ± 2°C Duration : 1000 hours
22 Accelerated damp heat
steady state
No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Applied current : Rated current × 70% Duration : 1000 hours
PERFORMANCE
3
FUSING CHARACTERISTICS
Reference Size 1608
0.5
0A
0.8
0A
1.0
0A
1.2
5A
1.6
0A
2.0
0A
2.5
0A
3.1
5A
4.0
0A
0.2
0A
0.2
5A
0.3
15
A
0.4
0A
0.6
3A
5.0
0A
6.3
0A
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fu
sin
g tim
e (
se
c)
Size 2012
0.5
0A
0.8
0A
1.0
0A
1.2
5A
1.6
0A
2.0
0A
2.5
0A
3.1
5A
4.0
0A
0.2
0A
0.2
5A
0.3
15
A
0.4
0A
0.6
3A
5.0
0A
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fu
sin
g tim
e (
se
c)
4
I2T–T CHARACTERISTICS
Reference Size 1608
0.50A
0.80A1.00A1.25A
1.60A2.00A2.50A3.15A
4.00A
0.20A
0.25A
0.315A
0.40A
0.63A
5.00A
6.30A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10
Fusing time(sec)
Jo
ule
in
teg
ral (A
2s
)
Size 2012
0.50A
0.80A1.00A1.25A
1.60A2.00A2.50A3.15A
4.00A
0.20A
0.25A
0.315A
0.40A
0.63A
5.00A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10
Fusing time (sec)
Jo
ule
in
teg
ral (A
2s
)
5
DISTRIBUTION OF FUSING CHARACTERISTICS
分布王
DISTRIBUTION OF FUSING TIME
KAB 2402 102 n:1158 pcs.
KAB 2402 102 n:100 pcs.
0.0001
0.001
0.01
0.1
1
0 20 40 60 80 100
Number of pieces
Fusin
g t
ime (
sec)
400% of rated cur rent ls appl led.
200% of rated current ls applled.
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current(A)
Fusin
g t
ime (
sec)
6
Determine the rated value of the microfuse, and select the correct microfuse for your circuit. If you select the correct microfuse, safety of your circuit can be ensured. How to determine the rated value of the microfuse is described below :
Flow for fuse selection 1. Measurement of circuit values using acute device
Measure the circuit values, such as operating current of the circuit.
2. Calculation from operating current
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the
applicable fuse.
3. Calculation from overload current
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
4. Calculation from inrush current
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine the rated value.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual device
Before determining the rated value of the fuse, preliminarily measure the following using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine
the number of inrush current applied.
1–4 Category temperature
Measure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE KAB
<Fuse selection>
Effective operating current : 1.2 A Effective overload current : 6.0 A Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 6.0 A) Numbers to withstand inrush current : 100,000 times Category temperature : 85°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.
Example : Effective operating current = 1.2 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.
②
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.
Rated current of fuse ≥ Operating current/ (①×②) ... Formula 1)
Example : Category temperature = 85°C, Operating current = 1.2 A
①Temperature derating factor = 0.90 (Refer to Fig. B.)
②Rated derating factor = 0.75
Calculation using Formula 1 :
Rated current ≥ 1.2/ (0.90×0.75) = 1.78 A
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE KAB)
Fig. B
Fig. A : Inrush current waveform
1ms
6.0A
0
20
40
60
80
100
120
140
-50 -25 0 25 50 75 100 125
Temperature()
De
ratin
g f
acto
r (%
)
KAB temperature derating
7
3. Calculation from overload current
3–1 Measurement of overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
Example : Effective overload current = 6.0 A
3–2 Calculation from overload current
Determine the rated current so that the overload current can be 2 times larger than the rated current.
Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≤ Overload current/2.0 ... Formula 2
Example : Overload current = 6.0 A
Use Formula 2 to calculate the rated current.
Rated current ≤ 6.0/2.0 = 3.0 A
The above calculation result shows that the fuse with rated current of 3.0 A or less should be selected for this circuit.
Type KAB, with rated current of 2.5 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush
current of the actual circuit.
4–2 Creation of approximate waveform
Generally, the waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of I2t of inrush current
Calculate I2t (Joule integral) of the approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 6.0 A,
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation
I2t of rush current = 1/3×Im2 × t ... Formula 3
(Im : Peak value, t : Pulse applying time)
Use Formula 3 to calculate the I2t of the rush current :
I2t = 1/3×6×6×0.001 = 0.012 (A2s)
* Following formula is generally used for calculation of 2t as i(t) equal to current.
2 t=∫0ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximate wave
1ms
6A
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
m
t 0 1 2
t
m
0
0 t
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 τ 1
2
1 2 t + (1-2) 2 t
1
3
Table A
8
4–4 Search of load ratio
①Set up the number of cycles to withsand. (generally
100,000 times)
②Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
Determine the load ratio using Fig. D.
If the rated current is 0.2 ~ 2.0 A : 30% or less
If the rated current is 2.5 ~ 4.0 A : 26% or less
If the rated current is 5.0 ~ 6.3 A : 22% or less
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard I2t for the fuse to be
used.
Standard I2t of fuse > (I2t of inrush current/load ratio) ..........
..........Formula 4
Example : I2t of pulse = 0.012 A2s,
Required load ratio = 30% (at 0.2 ~ 2.0 A Fuse),
26% (at 2.5 ~ 4.0 A Fuse) or
22% (at 5.0 ~ 6.3 A Fuse)
Example of 2.0 A Fuse : Use Formula 4 to calculate the
standard I2t of fuse.
Standard I2t of fuse > 0.012/0.3 = 0.04 (A2s)
The standard I2t of the fuse should be 0.04 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 0.04 A2s (vertical axis) from
Fig. E (refer to the arrow shown on Fig. E).
*Fig. E shows the Joule integral curves for size 1608. For
size 2012, use the Joule integral curves for the size. Select a fuse whose curve is above the intersection. Type KAB, with rated current of 1.6 A or more should be selected.
5. Final determination of rated value
Determine the rated current of the microfuse. The rated
current should meet all the above calculation results.
Example : Rated current of 2.0 A and 2.5 A meet the all
requirements.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly
under the pre-determined conditions.
PULSE RESISTANCE CHARACTERISTCS
JOULE INTEGRAL VS. FUSING TIME
Fig. D
Fig. E
×
Joule Integral Curves for size 1608
0.50A
0.80A1.00A1.25A
1.60A2.00A2.50A3.15A
4.00A
0.20A
0.25A
0.315A
0.40A
0.63A
5.00A
6.30A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10
Fusing time(sec)
Jo
ule
in
teg
ral (A
2s
)
10
100
1000
10000
100000
1000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Nu
mb
ers
of p
uls
e r
esis
tan
ce
(cycle
)
0.5A~2.0A
5.0A~6.3A
2.5A~4.0A
9
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications. According to item 2,2-2 Fuse will explode during test. During fusing tests, please
in page 7. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid or alkali corrosive
(4) When Micro Fuse are used in inrush current applications, atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight but not in corrosive atmosphere
(1) Mounting and adjusting with soldering irons are not such as H2S(hydrogen sulfide)or SO2(sulfur dioxide).
recommendable since temperature and time control is Direct sunlight may cause decolorization and deformation of
difficult. the exterior and taping. Also, there is a fear that solderability
In case of emergency for using soldering irons, be sure to will be remarkably lower in high humidity.
observe the conditions specified in the performance table. (2) If the products are stored for an extended period of time,
(2) Micro Fuse body should not have direct contact with a please contact Matsuo Sales Department for
soldering iron. recommendation. The longer storage term causes
(3) Once Micro Fuse mounted on the board, they should never packages and tapings to worsen. If the products are stored
be remounted on boards or substrates. for longer term, please contact Matsuo Sales Department
(4) During mounting, be careful not to apply any excessive for advice.
mechanical stresses to the Micro Fuse. (3) The products in taping, package, or box should not be
given any kind of physical pressure. Deformation of taping
3. Solvents or package may affect automatic mounting.
For cleaning of Micro Fuse, immersion in isopropyl alcohol
for 90 seconds (at 20 ~ 30°C liquid temp.) will not be 9. Disposal damaged. When Micro Fuse are disposed of as waste or “scrap”, they
If organic solvents (Pine AlphaTM
, Techno CareTM
, Clean should be treated as “industrial waste”. Micro Fuse contain
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure various kinds of metals and resins.
to preliminarily check that the solvent will not damage the
Micro Fuse. 10. Samples Micro Fuse received as samples should not be used in any
4. Ultrasonic Cleaning products or devices in the market. Samples are provided
Ultrasonic cleaning is not recommended for Micro Fuse. for a particular purpose such as configuration, confirmation
This may cause damage to the Micro Fuse such as broken of electrical characteristics, etc.
terminals which results in electrical characteristics effects,
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
10
In accordance with growth of portable electronic appliance, usage of Lithium ion battery is increasing.
Type KAB T Series micro fuse is designed for protection of Lithium ion battery, maintaining original characteristics with Resist
Current Pulse improved. Further more perfectly compliant to Lead-free makes environment friendly design.
1. Type KAB T Series show no variation and have excellent Resist Current Pulse in fusing characteristics.
2. Surface temperature rise is 75°C or less when applying rated current. This offers less influence on the peripheral units.
3. Suitable for automatic mounting
4. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”.
5. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C
6. High accuracy carrier tape by using pressed pocket paper ensures excellent mounting.
FEATURES
ORDERING INFORMATION
RATING
Type KAB T Series
K A B T 3 2 0 2 5 0 2 N A 2 9
Item Rating
Category Temperature Range -40 ~ +125
Rated Current 1.6-2.0-2.5-3.15-4.0-5.0-6.3A
Rated Voltage 32VDC
Voltage Drop Refer to CATALOG NUMBERS AND RATING
Insulation Resistance
(between Terminals and Case) 1000MΩ or more
Fusing Characteristics Fusing within 1 min if the current is 200% of rated current.
Breaking voltage:32V
Breaking current:50AClearing Characteristics
Type Series Code Voltage Code Rated current Code Rated current Code Packaging type Code Case size
KAB T 3202 32V 162 1.6 A 402 4.0 A NA φ180リール 29 1.6×0.8
202 2.0 A 502 5.0 A
252 2.5 A 632 6.3 A
322 3.15 A
1
CONSTRUCTION
CATALOG NUMBERS AND RATING
RECOMMENDED PAD DIMENSIONS
STANDARD TEST BOARD
100 mm
33 mm
5 mm
a mm
DIMENSIONS
MARKING
Catalog number Case sizeRated current
A
Internal resistance
mΩ
(Typical)
Voltage drop
mV
(Max.)
Rated voltage
VDC
Breaking current
A
KABT 3202 162 29 1.6×0.8 1.6 51 110
KABT 3202 202 29 1.6×0.8 2 39 110
KABT 3202 252 29 1.6×0.8 2.5 30 110
KABT 3202 322 29 1.6×0.8 3.15 22 110
KABT 3202 402 29 1.6×0.8 4 17 110
KABT 3202 502 29 1.6×0.8 5 12 110
KABT 3202 632 29 1.6×0.8 6.3 9.2 110
For taping specification, the package code (NA) is entered . One reel contains 5000 pcs.
UL/cUL approved File No.E17021
32 50
Code : Rated current
X : 1.6 A
2 : 2.0 A
Y : 2.5 A
3 : 3.15 A
4 : 4.0 A
5 : 5.0 A
6 : 6.3 A
Size 1608
a 1.0
b 1.2
c 1.0
(mm)
Case size Size a
1608 1.2
(mm)
Glass epoxy on one side
Copper layer : 35m
Board thickness : 1.6mm
Name Material
Fuse element Copper alloy
Body Alumina ceramic
Protective coating Silicone resin
Terminal Tin plating
Main Body : Alumina ceramic
Terminal:Tin plating (mm)
Case size Case code L W T max. P
1608 29 1.6 ± 0.1 0.8 ± 0.1 0.5 0.3 ± 0.2
August, 2010
W
P
T
P’
P
L
P’
1
Body
Protective coating
Terminal
Fuse element
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75°C. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply rated current.
3 Clearing characteristics Arc shall not be continued. Marking shall be legible.
Breaking voltage : Rated voltage Breaking current : 50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Apply rated current.
5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current. (Ambient temperature : 10 ~ 30°C)
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case (alumina ceramic)
7 Electrode strength
(Bending)
No mechanical damage. Resistance change after the test shall be within ± 20%
Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec. Duration : 30 sec. Bending : 3 mm
8 Shear test No mechanical damage. Resistance change after the test shall be within ± 20%
Applied force : 20 N (2.04 kgf) Duration : 10 sec. Tool : R0.5 Direction of the press : side face
9 Substrate bending test No mechanical damage. Resistance change after the test shall be within ± 20%
Supporting dimension : 0.8 mm (size 1608) Applied force : 10 N (1.02 kgf) Tool : R0.5 Direction of the press : thickness direction of product
10 Solderability
(Solder Wetting time) Solder Wetting time : within 3sec.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C meniscograph method
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C meniscograph method
11
Solderability
(new uniform coating of solder)
The dipping surface of the terminals shall be covered more than 95% with new solder.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C Dipping : 3 sec.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C Dipping : 3 sec.
12 Resistance to soldering heat
Marking shall be legible.
No mechanical damage.
Resistance change after the test shall be within ± 20%
Dipping (1 cycle) Preconditioning : 100 ~ 150°C, 60 sec. Temperature : 265 ± 3°C /6 ~ 7 sec.
Reflow soldering (2 cycles) Preconditioning : 1 ~ 2 min, 180°C or less Peak : 260°C max, 5 sec. Holding : 230 ~ 250°C, 30 ~ 40 sec. Cooling : more than 2 min.
Manual soldering Temperature : 350 ± 10°C Duration : 3 ~ 4 sec. Measure after 1 hour left under room temp. and humidity.
13 Solvent resistance Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%
Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec.
14 Ultrasonic Cleaning Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%
Ultrasonic : 20mW/cm2 28kHz
Solvent : Isopropyl alcohol Duration : 60 sec
15 Vibration No mechanical damage. Resistance change after the test shall be within ± 20%
Frequency range : 10 ~ 55 ~ 10 Hz/min Vibration amplitude : 1.5 mm Duration : 2 hours in each of XYZ directions (total : 6 hours)
16 Shock No mechanical damage. Resistance change after the test shall be within ± 20%
Peak value : 490 m/s2 (50 G)
Duration : 11 m sec. 6 aspects × 3 times (total : 18 times)
17 Thermal shock No mechanical damage. Resistance change after the test shall be within ± 20%
–55 ± 3°C : 30 min Room temperature : 2 ~ 3 min or les 125 ± 2°C : 30 min. Room temperature : 2 ~ 3 min or less Repeat above step for 10 cycles.
18 Atomizing salt water No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 35 ± 2°C Concentration (weight ratio) : 5 ± 1% Duration : 24 hours
19 Moisture resistance No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Duration : 1000 hours
20 Load life No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 2°C Applied current : Rated current × 50% Duration : 1000 hours
21 Stability No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 125 ± 2°C Duration : 1000 hours
22 Accelerated damp heat
steady state
No mechanical damage. Resistance change after the test shall be within ± 20%
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Applied current : Rated current × 50% Duration : 1000 hours
PERFORMANCE
3
FUSING CHARACTERISTICS
I2T–T CHARACTERISTICS
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fusin
g tim
e (
sec)
1.6
A2.0
A2
.5A
3.1
5A
4.0
A5
.0A
6.3
A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (sec)
Joule
inte
gra
l (A
2s)
2.0
A
2.5
A3
.15
A4
.0A
5.0
A
6.3
A
1.6
A
4
DISTRIBUTION OF FUSING CHARACTERISTICS
DISTRIBUTION OF FUSING TIME
分布王
KABT 3202 202 NA 29
KABT 3202 202 NA 29
0.0001
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fusin
g t
ime (
sec)
0.0001
0.001
0.01
0.1
1
10
0 10 20 30 40 50
200% of rated current is applied
500% of rated current is applied
Number of pieces
Fu
sin
g t
ime (
se
c)
5
Determine the rated value of the microfuse, and select the correct microfuse for your circuit. If you select the correct microfuse, safety of your circuit can be ensured. How to determine the rated value of the microfuse is described below :
Flow for fuse selection 1. Measurement of circuit values using acute device
Measure the circuit values, such as operating current of the circuit.
2. Calculation from operating current
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the
applicable fuse.
3. Calculation from overload current
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
4. Calculation from inrush current
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine the rated value.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual device
Before determining the rated value of the fuse, preliminarily measure the following using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine
the number of inrush current applied.
1–4 Category temperature
Measure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE KAB T Series
<Fuse selection>
Effective operating current : 1.2 A Effective overload current : 7.0 A Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 10.0 A) Numbers to withstand inrush current : 100,000 times Category temperature : 75°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.
Example : Effective operating current = 1.2 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.
②
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.
Rated current of fuse ≥ Operating current/ (①×②) ... Formula 1)
Example : Category temperature = 75°C, Operating current = 1.2 A
①Temperature derating factor = 0.92 (Refer to Fig. B.)
②Rated derating factor = 0.60
Calculation using Formula 1 :
Rated current ≥ 1.2/ (0.92×0.60) = 2.17 A
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE KAB T Series)
Fig. B
Fig. A : Inrush current waveform
1ms
10.0A
0
20
40
60
80
100
120
-50 -25 0 25 50 75 100 125
Temperature ()
De
ratin
g f
acto
r (%
)
KAB temperature derating
Use for a long time*1
6
3. Calculation from overload current
3–1 Measurement of overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
Example : Effective overload current =7.0 A
3–2 Calculation from overload current
Determine the rated current so that the overload current can be 2 times larger than the rated current.
Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≤ Overload current/2.0 ... Formula 2
Example : Overload current = 7.0 A
Use Formula 2 to calculate the rated current.
Rated current ≤ 7.0/2.0 = 3.5 A
The above calculation result shows that the fuse with rated current of 3.5 A or less should be selected for this circuit.
Type KAB T Series, with rated current of 3.15 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush
current of the actual circuit.
4–2 Creation of approximate waveform
Generally, the waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of I2t of inrush current
Calculate I2t (Joule integral) of the approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 10.0 A,
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation
I2t of rush current = 1/3×Im2 × t ... Formula 3
(Im : Peak value, t : Pulse applying time)
Use Formula 3 to calculate the I2t of the rush current :
I2t = 1/3×10×10×0.001 = 0.033 (A2s)
* Following formula is generally used for calculation of 2t as i(t) equal to current.
2 t=∫0ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximate wave
1ms
10A
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
m
t 0 1 2
t
m
0
0 t2
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 t 1
2
1 2 t + (1-2) 2 t
1
3
Table A
7
4–4 Search of load ratio
①Set up the number of cycles to withsand. (generally
100,000 times)
②Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
Determine the load ratio using Fig. D.
Required load ratio = 18% or less
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard I2t for the fuse to be
used.
Standard I2t of fuse > (I2t of inrush current/load ratio) ..........
..........Formula 4
Example : I2t of pulse = 0.033 A2s,
Required load ratio = 18%
Use Formula 4 to calculate the standard I2t:
Standard I2t of fuse > 0.033/0.18 = 0.183 (A2s)
The standard I2t of the fuse should be 0.183 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 0.183 A2s (vertical axis) from
Fig. E (refer to the arrow shown on Fig. E).
*Fig. E shows the Joule integral curves for size 1608. For
size 2012, use the Joule integral curves for the size. Select a fuse whose curve is above the intersection. Type
KAB T Series, with rated current of 2.0 A or more should be selected.
5. Final determination of rated value
Determine the rated current of the microfuse. The rated
current should meet all the above calculation results.
Example : Rated current of 2.5 A and 3.15 A meet the all
requirements.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly
under the pre-determined conditions.
PULSE RESISTANCE CHARACTERISTCS
JOULE INTEGRAL VS. FUSING TIME
Fig. D
Fig. E
0.0001
0.001
0.01
0.1
1
10
100
1000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (sec)
Joule
inte
gra
l (A
2s)
2.0
A2
.5A
3.1
5A
4.0
A5
.0A
6.3
A
1.6
A
1618202224262830
1
10
100
1000
10000
100000
1000000
10000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Num
be
rs o
f puls
e r
esis
tance (
cycle
)
8
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications. According to item 2,2-2 in Fuse will explode during test. During fusing tests, please
page 6. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid, alkali, or active
(4) When Micro Fuse are used in inrush current applications, gas atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight. Direct sunlight may cause
(1) Mounting and adjusting with soldering irons are not decolorization and deformation of the exterior and taping.
recommendable since temperature and time control is Also, there is a fear that solderability will be remarkably
difficult. lower in high humidity.
In case of emergency for using soldering irons, be sure to (2) If the products are stored for an extended period of time,
observe the conditions specified in the performance table. please contact Matsuo Sales Department for
(2) Micro Fuse body should not have direct contact with a recommendation. The longer storage term causes
soldering iron. packages and tapings to worsen. If the products are stored
(3) Once Micro Fuse mounted on the board, they should never for longer term, please contact Matsuo Sales Department
be remounted on boards or substrates. for advice.
(4) During mounting, be careful not to apply any excessive (3) The products in taping, package, or box should not be
mechanical stresses to the Micro Fuse. given any kind of physical pressure. Deformation of taping
or package may affect automatic mounting.
3. Solvents For cleaning of Micro Fuse, immersion in isopropyl alcohol 9. Disposal for 90 seconds (at 20 ~ 30°C liquid temp.) will not be When Micro Fuse are disposed of as waste or “scrap”, they
damaged. should be treated as “industrial waste”. Micro Fuse contain
If organic solvents (Pine AlphaTM
, Techno CareTM
, Clean various kinds of metals and resins.
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure
to preliminarily check that the solvent will not damage the 10. Samples Micro Fuse. Micro Fuse received as samples should not be used in any
products or devices in the market. Samples are provided
4. Ultrasonic Cleaning for a particular purpose such as configuration, confirmation
Ultrasonic cleaning is not recommended for Micro Fuse. of electrical characteristics, etc.
This may cause damage to the Micro Fuse such as broken
terminals which results in electrical characteristics effects,
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
9
Type JAE micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electric circuit around battery, etc. because the demand for high capacity batteries is increasing. Wire material is adopted for fuse element, and the performance against rush current is increased in spite of compact design.
Also, the ecology design of Type JAE is environmentally friendly because of complete lead-free.
1. Our original construction design has excellent fusing and cutting characteristics. 2. Especially, performance against rush current is excellent since wire material is used for fuse element.
3. Surface temperature rise is 75°C or less when applying rated current for fusing. This gives less influence to the peripheral units. 4. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C 5. Our original terminal construction makes almost no occurrence of Tombstone phenomenon.
6. Small size of 3216 (3.2 × 1.6 × 1.4 mm) 7. Suitable for automatic mounting 8. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide ―Self-Alignment‖.
9. Complete lead-free
FEATURES
CATALOG NUMBERS AND RATING
November, 2010
RATING
ORDERING INFORMATION
Internal resistance Voltage drop
mΩ mV
(Typical) (Max.)
JAE 2402 401 52 3.2×1.6 0.4 310 220
JAE 2402 501 52 3.2×1.6 0.5 240 200
JAE 2402 631 52 3.2×1.6 0.63 190 150
JAE 2402 801 52 3.2×1.6 0.8 145 150
JAE 2402 102 52 3.2×1.6 1.0 118 150
JAE 2402 132 52 3.2×1.6 1.25 93 150
JAE 2402 162 52 3.2×1.6 1.6 70 150
JAE 2402 202 52 3.2×1.6 2.0 54 150
JAE 2402 252 52 3.2×1.6 2.5 43 150
JAE 2402 322 52 3.2×1.6 3.15 34 150
For the taping type, the packing code ―NA‖ will be entered in .
Catalog numbers are approved by UL and cUL. (File No.E170721)
24 50
Catalog number Case sizeBreaking current
A
Rated current
A
Rated voltage
VDC
J A E 2 4 0 2 2 5 2 N A 5 2
Type Code RV Code Rated current Code Rated current Code Package type Code Case size
401 0.4 A 132 1.25A NA φ180 Reel 52 3.2×1.6
501 0.5 A 162 1.6 A
631 0.63A 202 2.0 A
801 0.8 A 252 2.5 A
102 1.0 A 322 3.15A
JAE 2402 24V
Type JAE
Item
Category Temperature Range
Rated Current
Rated Voltage
Voltage Drop
Insulation Resistance
(between terminals and case) 1000 MΩ or more
Fusing Characteristics
Breaking voltage : 24 VClearing Characteristics
Breaking current : 50 A
24VDC
Rating
-40 ~+125
Fusing within 2 minute if the current is 250% of rated current.
0.4-0.5-0.63-0.8-1.0-1.25-1.6-2.0-2.5-3.15A
Refer to CATALOG NUMBERS AND RATING
1
CONSTRUCTION
STANDARD TEST BODY
DIMENSIONS
MARKING
RECOMMENDED PAD DIMENSIONS
P
L
W
T
3 Main body : Glass epoxy
Terminal : Tin plating (mm)
Case size Case code L W T P
3216 52 3.2 ± 0.2
1.6 ± 0.2
1.4 ± 0.2
0.6 ± 0.2
Code : Rated current Code : Rated current
S : 0.40A
T : 0.50A
U : 0.63A
V : 0.80A
1 : 1.00A
W : 1.25A
X : 1.60A
2 : 2.00A
Y : 2.50A
3 : 3.15A
Body Fuse element Space Terminal
(mm)
a 1.0
b 1.6
c 1.6
(Reflow)
Size 3216
Name Material, standard, and treatment
Fuse element Lead-free alloy
Space —
Terminal Tin plating
Body Glass epoxy
100mm
33mm
1.5mm
5mm
Glass epoxy body on one side
Board thickness : 1.6 mm
Copper layer :3 μm
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75°C. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply 100% of rated current.
3 Clearing characteristics Arc shall not be continued. Marking shall be legible.
Breaking voltage : 24V Breaking current : 50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Apply rated current.
5 Fusing characteristics Fusing within 2 min. Apply 250% of rated current. (Ambient temperature : 10 ~ 30°C)
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case
7 Electrode strength (Bending)
No mechanical damage. Resistance change after the test shall be within ± 20%.
Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec. Duration : 5 sec. Bending : 3 mm
8 Shear test No mechanical damage. Resistance change after the test shall be within ± 20%.
Applied force : 20 N (2.04 kgf) Duration : 10 sec. Tool : R0.5 Direction of the press : side face
9 Substrate bending test No mechanical damage. Resistance change after the test shall be within ± 20%.
Supporting dimension : 1.6 mm Applied force : 20 N (2.04 kgf) Duration : 10 sec. Tool : R0.5 Direction of the press : thickness direction of product
10 Solderability (Solder Wetting time) Solder Wetting time : within 3sec.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C meniscograph method
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C meniscograph method
11 Solderability (new uniform coating of solder)
The dipping surface of the terminals shall be covered more than 95% with new solder.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C Dipping : 3 sec.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C Dipping : 3 sec.
12 Resistance to soldering heat Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%.
Dipping (1 cycle) Preconditioning : 100 ~ 150°C, 30±5 sec. Temperature : 260 ± 3°C, 5 sec.
Reflow soldering (2 cycles) Preconditioning : 150~180°C、90±30 sec. Peak : 250 °C Holding : 230°C or higher, 30±10 sec. Cooling : 3 ~ 6°C/sec or faster
Manual soldering Temperature : 350 ± 10°C Duration : 2 ~ 3 sec Measure after 1 hour left under room temperature and humidity.
13 Solvent resistance Marking shall be legible. No mechanical damage. No significant irregularity in the appearance.
Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec.
14 Vibration No mechanical damage. Resistance change after the test shall be within ± 20%.
Frequency range : 10 ~ 55 ~ 10 Hz/min Vibration amplitude : 1.5 mm Duration : 2 hours in each of XYZ directions
(total : 6 hours)
15 Shock No mechanical damage. Resistance change after the test shall be within ± 20%.
Peak value : 490 m/s2(50G)
Duration : 11 m sec. 6 aspects × 3 times (total : 18 times)
16 Thermal shock No mechanical damage. Resistance change after the test shall be within ± 20%.
–55 ± 3°C : 30 min. Room temperature : 2 ~ 3 min or less 125 ± 2°C : 30 min. Room temperature : 2 ~ 3 min or less Repeat above step for 10 cycles
17 Moisture resistance No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Duration : 1000 hours
18 Load life No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 2°C Applied current : Rated current × 100% Duration : 1000 hours
19 Moisture resistance load No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 2°C Humidity : 85 ± 5% RH Applied voltage : rated current × 100% Duration : 1000 h
20 Stability No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 125 ± 2°C Duration : 1000 hours
PERFORMANCE
+5 -0
+1 -0
3
JAE 2402 252NA52 n=100 JAE 2402 252NA52
DISTRIBUTION OF FUSING TIME
DISTRIBUTION OF FUSING CHARACTERISTICS
I2T-T CHARACTERISTICS
FUSING CHARACTERISTICS
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fusin
g tim
e (
sec)
0.5
A0
.63
A0
.8A
1.0
A1
.25
A1
.6A
2.0
A2
.5A
3.1
5A
0.4
A
0.001
0.01
0.1
1
10
100
1000
10000
0.001 0.01 0.1 1 10 100
Fusing time (sec)
Joule
inte
gra
l (A
2s)
0.8A0.63A
3.15A2.5A2.0A1.6A1.25A1.0A
0.5A0.4A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.1 1 10 100
Applied current (A)
Fusin
g t
ime (
sec)
0.0001
0.001
0.01
0.1
1
0 20 40 60 80
250% rated current is applied
800% rated current is applied
Numbers of pcs
Fu
sin
g tim
e (
se
c)
4
Determine the rated value of circuit protection element, and select the correct circuit protection element for your circuit. If you select
the correct circuit protection element, safety of your circuit can be ensured. How to determine the rated value of the circuit protection element is described below :
Flow for fuse selection
1. Measurement of circuit values using actual device
Measure the circuit values, such as operating current of the circuit.
2. Calculation from operating current
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable fuse.
3. Calculation from overload current
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
4. Calculation from inrush current
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine the rated value.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual device
Before determining the rated value of the fuse, preliminarily measure the following using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine
the number of inrush current applied.
1–4 Category temperature
Measure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE JAE
<Fuse selection>
Effective operating current : 1.2 A
Effective overload current : 6.0 A
Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 6.0 A)
Numbers to withstand inrush current : 100,000 times
Category temperature : 85°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.
Example : Effective operating current = 1.2 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.
②Rated derating factor
Rated derating factor = 1.0 (Constant irrespective of temperature)
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.
Rated current of fuse ≥ Operating current / (① × ②) ... Formula 1
Example: Category temperature = 85°C, Operating current = 1.2 A
①Temperature derating factor = 0.76 (Refer to Fig. B.)
②Rated derating factor = 1.0 (Constant irrespective of temperature)
Calculation using Formula 1 :
Rated current ≥ 1.2 / (0.76 × 1.0) = 1.58 A
The above calculation result shows that the fuse with rated current of 1.58 A or more should be selected for this circuit.
Type JAE, with rated current of 1.6 A or more can be selected.
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE JAE)
6.0A
Fig. A : Inrush current waveform
1ms
Fig. B
0
20
40
60
80
100
120
-50 -25 0 25 50 75 100 125
Temperature ()
De
ratin
g fa
cto
r (%
)
JAE temperature derating
5
3. Calculation from overload current
3–1 Measurement of overload current
Using oscilloscope or equivalents, measure the overload current that needs to break the circuit.
Example : Effective overload current = 6.0 A
3–2 Calculation from overload current
Determine the rated current so that the overload current can be 2.5 times larger than the rated current.
Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≤ Overload current / 2.5 ... Formula 2
Example : Overload current = 6.0 A
Use Formula 2 to calculate the rated current.
Rated current ≤ 6.0 / 2.5 = 2.4 A
The above calculation result shows that the fuse with rated current of 2.4 A or less should be selected for this circuit.
Type JAE, with rated current of 2.0 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush
current of the actual circuit.
4–2 Creation of approximate waveform
Generally, the waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of 2t of inrush current
Calculate 2t (Joule integral) of the approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 6.0 A,
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation.
2t of rush current = 1 / 3 × m2 × t ... Formula 3
(m : Peak value, t : Pulse applying time)
Use Formula 3 to calculate 2t of the rush current :
2t = 1 / 3 × 6 × 6 × 0.001 = 0.012 (A2s)
*Following formula is generally used for calculation of 2t as i(t) equal to current.
2t=∫0
ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximate waveform
6.0A
1ms
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
m
t 0 1
2
t
m
0
0 t
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 t 1
2
1 2 t + (1-2) 2 t
1
3
Table A
6
4–4 Search of load ratio
①Set up the number of cycles to withstand. (generally
100,000 times)
②Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
The load ratio is 20% or less from Fig. D.
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard 2t for the fuse to be
used.
Standard 2t of fuse > ( 2t of inrush current / load ratio)
..........Formula 4
Example : 2t of pulse = 0.012 A2s, Pulse applied = 1 ms,
Required load ratio = 20%
From Formula 4,
Standard 2t of fuse > 0.012 / 0.2 = 0.06 (A2s)
The standard 2t of the fuse should be 0.06 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 0.06 A2s (vertical axis) from Fig.
E (refer to the arrow shown in Fig.E).
Select a fuse whose curve is above the intersection. Type
JAE, with rated current of 0.63 A or more should be selected.
5. Final determination of rated value
Determine the rated current of the micro fuse. The rated
current should meet all the calculation results.
Example : 1.6 A and 2.0 A meet the all requirement.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly
under the pre-determined conditions.
PULSE RESISTANCE CHARACTERISTICS
JOULE INTEGRAL VS. FUSING TIME
Fig. D
Fig. E
1
10
100
1000
10000
100000
1000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Num
ber
of
puls
e r
esis
tance (
cycle
)
0.001
0.01
0.1
1
10
100
1000
10000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (s)
Joule
inte
gra
l (A
2s)
7
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications.According to item 2,2-2 in Fuse will explode during test. During fusing tests, please
page 5. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid or alkali corrosive
(4) When Micro Fuse are used in inrush current applications, atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight but not in corrosive atmosphere
(1) Mounting and adjusting with soldering irons are not such as H2S(hydrogen sulfide)or SO2(sulfur dioxide).
recommendable since temperature and time control is Direct sunlight may cause decolorization and deformation of
difficult. the exterior and taping. Also, there is a fear that solderability
In case of emergency for using soldering irons, be sure to will be remarkably lower in high humidity.
observe the conditions specified in the performance table. (2) If the products are stored for an extended period of time,
(2) Micro Fuse body should not have direct contact with a please contact Matsuo Sales Department for
soldering iron. recommendation. The longer storage term causes
(3) Once Micro Fuse mounted on the board, they should never packages and tapings to worsen. If the products are stored
be remounted on boards or substrates. for longer term, please contact Matsuo Sales Department
(4) During mounting, be careful not to apply any excessive for advice.
mechanical stresses to the Micro Fuse. (3) The products in taping, package, or box should not be
given any kind of physical pressure. Deformation of taping
3. Solvents or package may affect automatic mounting.
For cleaning of Micro Fuse, immersion in isopropyl alcohol
for 90 seconds (at 20 ~ 30°C liquid temp.) will not be 9. Disposal damaged. When Micro Fuse are disposed of as waste or ―scrap‖, they
If organic solvents (Pine AlphaTM
, Techno CareTM
, Clean should be treated as ―industrial waste‖. Micro Fuse contain
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure various kinds of metals and resins.
to preliminarily check that the solvent will not damage the
Micro Fuse. 10. Samples Micro Fuse received as samples should not be used in any
4. Ultrasonic Cleaning products or devices in the market. Samples are provided
Ultrasonic cleaning is not recommended for Micro Fuse. for a particular purpose such as configuration, confirmation
This may cause damage to the Micro Fuse such as broken of electrical characteristics, etc.
terminals which results in electrical characteristics effects,
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
8
Type JAG micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electric circuit around battery, etc. because the demand for high capacity batteries is increasing. Wire material is adopted for fuse element, and the performance against rush current is increased in spite of compact design.
Also, the ecology design of Type JAG is environmentally friendly because of complete lead-free.
1. Our original construction design has excellent fusing and cutting characteristics.
2. Especially, performance against rush current is excellent since wire material is used for fuse element.
3. Surface temperature rise is 75°C or less when applying rated current for fusing. This gives less influence to the peripheral units.
4. Resistance to soldering heat: Reflow or flow soldering 10 seconds at 260 °C
5. Our original terminal construction makes almost no occurrence of Tombstone phenomenon.
6. Small size of 3216 (3.2×1.6×1.6 mm)
7. Suitable for automatic mounting
8. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide ―Self-Alignment‖.
9. Complete lead-free
FEATURES
CATALOG NUMBERS AND RATING
November, 2010
RATING
ORDERING INFORMATION
J A G 3 2 0 2 2 5 2 N A 5 2
Type Code RV Code Rated current Code Rated current Code Package type Code Case size
501 0.5 A 162 1.6 A NA φ180 Reel 52 3.2×1.6
631 0.63A 202 2.0 A
801 0.8 A 252 2.5 A
102 1.0 A 322 3.15A
132 1.25 A 402 4.0 A
JAG 3202 32V
Internal resistance Voltage drop
mΩ mV(Typical) (Max.)
JAG 3202 501 52 3.2×1.6 0.5 310 280
JAG 3202 631 52 3.2×1.6 0.63 240 240
JAG 3202 801 52 3.2×1.6 0.8 190 200
JAG 3202 102 52 3.2×1.6 1.0 145 200
JAG 3202 132 52 3.2×1.6 1.25 118 200
JAG 3202 162 52 3.2×1.6 1.6 93 200
JAG 3202 202 52 3.2×1.6 2.0 70 200
JAG 3202 252 52 3.2×1.6 2.5 54 200
JAG 3202 322 52 3.2×1.6 3.15 43 200
JAG 3202 402 52 3.2×1.6 4.0 34 200
For the taping type, the packing code ―NA‖ will be entered in .Catalog numbers are approved by UL and cUL. (File No.E170721)
32 50
Catalog number Case sizeBreaking current
A
Rated current
A
Rated voltage
VDC
Type JAG
Item
Category Temperature Range
Rated Current
Rated Voltage
Voltage Drop
Insulation Resistance
(between terminals and case) 1000 MΩ or more
Fusing Characteristics
Breaking voltage : 32 VClearing Characteristics
Breaking current : 50 A
32VDC
Rating
- 40 ~ +125
Fusing within 1 minute if the current is 200% of rated current.
0.5-0.63-0.8-1.0-1.25-1.6-2.0-2.5-3.15-4.0A
Refer to CATALOG NUMBERS AND RATING
1
CONSTRUCTION
STANDARD TEST BODY
DIMENSIONS
MARKING
RECOMMENDED PAD DIMENSIONS
P
L
W
T
4
Code : Rated current Code : Rated current
T : 0.50A
U : 0.63A
V : 0.80A
1 : 1.00A
W : 1.25A
X : 1.60A
2 : 2.00A
Y : 2.50A
3 : 3.15A
4 : 4.00A
Space Body Fuse element
Terminal
Main body : Glass epoxy
Terminal : Tin plating (mm)
Case size Case code L W T P
3216 52 3.2 ± 0.2
1.6 ± 0.2
1.4 ± 0.2
0.6 ± 0.2
Name Material, standard, and treatment
Fuse element Lead-free alloy
Space —
Terminal Tin plating
Body Glass epoxy
(mm)
a 1.0
b 1.6
c 1.6
(Reflow)
Size 3216
Glass epoxy body on one side
Board thickness : 1.6 mm
Copper layer :3 μm
100mm
33mm
1.5mm
5mm
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75°C. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply 100% of rated current.
3 Clearing characteristics Arc shall not be continued. Marking shall be legible.
Breaking voltage : 32 V Breaking current : 50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Apply rated current.
5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current. (Ambient temperature : 10 ~ 30°C)
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case
7 Electrode strength (Bending)
No mechanical damage. Resistance change after the test shall be within ± 20%.
Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec. Duration : 5 sec. Bending : 3 mm
8 Shear test No mechanical damage. Resistance change after the test shall be within ± 20%.
Applied force : 20 N (2.04 kgf) Duration : 10 sec. Tool : R0.5 Direction of the press : side face
9 Substrate bending test No mechanical damage. Resistance change after the test shall be within ± 20%.
Supporting dimension : 1.6 mm Applied force : 20 N (2.04 kgf) Duration : 10 sec. Tool : R0.5 Direction of the press : thickness direction of product
10 Solderability (Solder Wetting time)
Solder Wetting time : within 3sec. Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C meniscograph method
11 Solderability (new uniform coating of solder)
The dipping surface of the terminals shall be covered more than 95% with new solder.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C meniscograph method
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C Dipping : 3 sec.
12
Resistance to soldering heat
Marking shall be legible. No mechanical damage.
Resistance change after the test shall be within ± 20%.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C Dipping : 3 sec.
Dipping (1 cycle) Preconditioning : 100 ~ 150°C, 30±5 sec. Temperature : 260 ± 3°C, 5 sec.
Reflow soldering (2 cycles) Preconditioning : 150~180°C、90±30 sec. Peak : 250 °C Holding : 230°C or higher, 30±10 sec. Cooling : 3 ~ 6°C/sec or faster
Manual soldering Temperature : 350 ± 10°C Duration : 2 ~ 3 sec Measure after 1 hour left under room temperature and humidity.
13 Solvent resistance Marking shall be legible. No mechanical damage. No significant irregularity in the appearance.
Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec.
14 Vibration No mechanical damage. Resistance change after the test shall be within ± 20%.
Frequency range : 10 ~ 55 ~ 10 Hz/min Vibration amplitude : 1.5 mm Duration : 2 hours in each of XYZ directions
(total : 6 hours)
15 Shock No mechanical damage. Resistance change after the test shall be within ± 20%.
Peak value : 490 m/s2(50G)
Duration : 11 m sec. 6 aspects × 3 times (total : 18 times)
16 Thermal shock No mechanical damage. Resistance change after the test shall be within ± 20%.
–55 ± 3°C : 30 min. Room temperature : 2 ~ 3 min or less 125 ± 2°C : 30 min. Room temperature : 2 ~ 3 min or less Repeat above step for 10 cycles
17 Moisture resistance No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Duration : 1000 hours
18 Load life No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 2°C Applied current : Rated current × 70% Duration : 1000 hours
19 Moisture resistance load No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 2°C Humidity : 85 ± 5% RH Applied voltage : rated current × 70% Duration : 1000 h
20 Stability No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 125 ± 2°C Duration : 1000 hours
PERFORMANCE
+1 -0
+5 -0
3
JAG 3202 322NA52 n=100 JAG 3202 322NA52
DISTRIBUTION OF FUSING TIME
DISTRIBUTION OF FUSING CHARACTERISTICS
I2T-T CHARACTERISTICS
FUSING CHARACTERISTICS
0.001
0.01
0.1
1
10
100
0.1 1 10 100
Applied current (A)
Fusin
g tim
e (
sec)
0.5
A0
.63
A0
.8A
1.0
A1
.25
A1
.6A
2.0
A2
.5A
3.1
5A
4.0
A
0.001
0.01
0.1
1
10
100
1000
10000
0.001 0.01 0.1 1 10 100
Fusing time (sec)
Joule
inte
gra
l (A
2s)
0.5A0.63A0.8A1.0A1.25A
1.6A2.0A2.5A3.15A4.0A
0.0001
0.001
0.01
0.1
1
10
100
1000
0.1 1 10 100
Applied current (A)
Fusin
g t
ime (
sec)
0.0001
0.001
0.01
0.1
1
10
0 50 100 150 200 250
200% rated current is applied
800% rated current is applied
Numbers of pcs
Fu
sin
g tim
e (
se
c)
4
Determine the rated value of the micro fuse, and select the correct circuit protection element for your circuit. If you select the correct
circuit protection element, safety of your circuit can be ensured. How to determine the rated value of the circuit protection element is described below:
Flow for fuse selection
1. Measurement of circuit values using actual device
Measure the circuit values, such as operating current of the circuit.
2. Calculation from operating current
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable fuse.
3. Calculation from overload current
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
4. Calculation from inrush current
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine the rated value.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual device
Before determining the rated value of the fuse, preliminarily measure the following using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine the
number of inrush current applied.
1–4 Category temperature
Measure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE JAE
<Fuse selection>
Effective operating current : 1.2 A
Effective overload current : 6.0 A
Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 6.0 A)
Numbers to withstand inrush current : 100,000 times
Category temperature : 85°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.
Example : Effective operating current = 1.2 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.
②Rated derating factor
Rated derating factor = 0.78 (Constant irrespective of temperature)
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.
Rated current of fuse ≥ Operating current/(① × ②) ... Formula 1
Example : Category temperature = 85°C, Operating current = 1.2 A
①Temperature derating factor = 0.76 (Refer to Fig. B.)
②Rated derating factor = 0.78 (Constant irrespective of temperature)
Calculation using Formula 1 :
Rated current ≥ 1.2/(0.76 × 0.78) = 2.02 A
The above calculation result shows that the fuse with rated current of 2.02 A or more should be selected for this circuit.
Type JAG, with rated current of 2.5 A or more can be selected.
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE JAG)
Fig. A : Inrush current waveform
Fig. B
0
20
40
60
80
100
120
-50 -25 0 25 50 75 100 125
Temperature ()
Dera
ting facto
r (%
)
JAG temperature derating
6.0A
1ms
5
3. Calculation from overload current
3–1 Measurement of overload current
Using oscilloscope or equivalents, measure the overload current that needs to break the circuit.
Example : Effective overload current = 6.0 A
3–2 Calculation from overload current
Determine the rated current so that the overload current can be 2.0 times larger than the rated current.
Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≤ Overload current/2.0 ... Formula 2
Example : Overload current = 6.0 A
Use Formula 2 to calculate the rated current.
Rated current ≤ 6.0/2.0 = 3.0 A
The above calculation result shows that the fuse with rated current of 3.0 A or less should be selected for this circuit.
Type JAG, with rated current of 2.5 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush
current of the actual circuit.
4–2 Creation of approximate waveform
Generally, the waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of 2t of inrush current
Calculate 2t (Joule integral) of the approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 6.0 A
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation.
2t of rush current = 1/3 × m2 × t ... Formula 3
(m : Peak value, t : Pulse applying time)
Use Formula 3 to calculate I2t of the rush current:
2t = 1/3 × 6 × 6 × 0.001 = 0.012 (A2s)
*Following formula is generally used for calculation of 2t as i(t) equal to current.
Ⅰ2 t=∫0ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximate waveform
6.0A
1ms
Table A
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
m
t 0 1
2
t
m
0
0 t
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 t 1
2
1 2 t + (1-2) 2 t
1
3
6
4–4 Search of load ratio
①Set up the number of cycles to withstand. (generally
100,000 times)
②Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
The load ratio is 20% or less from Fig. D.
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard I2t for the fuse to be
used.
Standard 2t of fuse > (2t of inrush current/load ratio) .......... ..........Formula 4
Example : 2t of pulse = 0.012 A2s,
Pulse applied = 1 ms, Required load ratio = 20%
From Formula 4, Standard 2t of fuse > 0.012/0.2 = 0.06 (A2s)
The standard 2t of the fuse should be 0.06 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 0.06 A2s (vertical axis) from Fig. E (refer to the arrow shown in Fig.E).
Select a fuse whose curve is above the intersection. Type
JAG, with rated current of 0.8 A or more should be selected.
5. Final determination of rated value
Determine the rated current of the micro fuse. The rated
current should meet all the calculation results.
Example : 2.5A meets the all requirement.
6. Operation check using actual device
After selecting the rating, confirm if the device works properly
under the pre-determined conditions.
PULSE RESISTANCE CHARACTERISTICS
JOULE INTEGRAL VS. FUSING TIME
Fig. D
Fig. E
1
10
100
1000
10000
100000
1000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Num
ber
of
puls
e r
esis
tance (
cycle
)
0.001
0.01
0.1
1
10
100
1000
10000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (sec)
Joule
inte
gra
l (A
2s)
0.5A0.63A0.8A1.0A1.25A
1.6A2.0A2.5A3.15A4.0A
7
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications.According to item 2,2-2 in Fuse will explode during test. During fusing tests, please
page 5. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid or alkali corrosive
(4) When Micro Fuse are used in inrush current applications, atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight but not in corrosive atmosphere
(1) Mounting and adjusting with soldering irons are not such as H2S(hydrogen sulfide)or SO2(sulfur dioxide).
recommendable since temperature and time control is Direct sunlight may cause decolorization and deformation of
difficult. the exterior and taping. Also, there is a fear that solderability
In case of emergency for using soldering irons, be sure to will be remarkably lower in high humidity.
observe the conditions specified in the performance table. (2) If the products are stored for an extended period of time,
(2) Micro Fuse body should not have direct contact with a please contact Matsuo Sales Department for
soldering iron. recommendation. The longer storage term causes
(3) Once Micro Fuse mounted on the board, they should never packages and tapings to worsen. If the products are stored
be remounted on boards or substrates. for longer term, please contact Matsuo Sales Department
(4) During mounting, be careful not to apply any excessive for advice.
mechanical stresses to the Micro Fuse. (3) The products in taping, package, or box should not be
given any kind of physical pressure. Deformation of taping
3. Solvents or package may affect automatic mounting.
For cleaning of Micro Fuse, immersion in isopropyl alcohol
for 90 seconds (at 20 ~ 30°C liquid temp.) will not be 9. Disposal damaged. When Micro Fuse are disposed of as waste or ―scrap‖, they
If organic solvents (Pine AlphaTM
, Techno CareTM
, Clean should be treated as ―industrial waste‖. Micro Fuse contain
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure various kinds of metals and resins.
to preliminarily check that the solvent will not damage the
Micro Fuse. 10. Samples Micro Fuse received as samples should not be used in any
4. Ultrasonic Cleaning products or devices in the market. Samples are provided
Ultrasonic cleaning is not recommended for Micro Fuse. for a particular purpose such as configuration, confirmation
This may cause damage to the Micro Fuse such as broken of electrical characteristics, etc.
terminals which results in electrical characteristics effects,
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
8
MICRO FUSE
Size 3216
PRODUCTS DATA SHEET
UL/cUL approvedFile No. E170721
RoHS COMPLIANTLEAD FREE
Type JAH
No. P-JAH-002DATE 2008-10
Item
Catalog number
3.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.63.2 × 1.6
20020020020020020020020016015012080
Rated currentA
Internal resistancemΩ
(Typical)
Voltage dropmV
(Max.)
Rated voltageVDC
Breaking currentACase size
For the taping type, the packing code “NA” will be entered in .UL and cUL for the catalog numbers marked are being applied. (To be approved on March,2009)The catalog numbers without mark are approved by UL and cUL. (File No.E170721)
-2-
J A H
TypeJAH
Code7202
Code102132162202252322
Rated current 1.0 A1.25 A 1.6 A 2.0 A 2.5 A3.15 A
Code402502632802103133
Rated current 4.0 A 5.0 A 6.3 A 8.0 A10.0 A12.5 A
CodeNA
Package typef180 Reel
Code52
Case size3.2 × 1.6
RV72 V
Type JAH micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electric circuit around battery, etc. because the demand for high capacity batteries is increasing.Wire material is adopted for fuse element, and the performance against rush current is increased in spite of compact design.Also, the ecology design of Type JAH is gentle because of complete lead-free.
1. Our original terminal construction eliminates Tombstone phenomenon. 2. Our original construction design provided excellent fusing and quick acting characteristics. 3. Especially, performance against rush current is excellent since wire material is used for fuse element.4. Surface temperature rise is 75°C or less when applying rated current for fusing. This offers less influence on the peripheral units.5. Small size of 3216 (3.2 × 1.6 × 1.4 mm) 6. Suitable for automatic mounting7. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”. 8. Resistance to soldering heat: Flow soldering 10 seconds at 260°C and Reflow soldering 5 seconds at 250°C respectively.9. A tape carrier of 8 mm width will be provided as a standard package material.10. Complete lead-free
Category Temperature Range
Rated Current
Rated Voltage
Voltage Drop
Insulation Resistance
(between terminals and case)
Fusing Characteristics
Breaking Capacity
Rating-40 ~ +125°C1.0–1.25–1.6–2.0–2.5–3.15–4.0–5.0–6.3–8.0–10.0–12.5 A
72 VDC
Refer to the list of standard products.
1000 MΩ or more
Fusing within 1 minute if the current is 200% of rated current.
Breaking voltage : 72 V
Breaking current : 50 A
7 2 0 2 8 0 2 N A 5 2
CATALOG NUMBERS AND RATING
ORDERING INFORMATION
RATING
FEATURES
1.01.251.62.02.53.154.05.06.38.0
10.012.5
JAH 7202 102 52 JAH 7202 132 52 JAH 7202 162 52 JAH 7202 202 52 JAH 7202 252 52 JAH 7202 322 52 JAH 7202 402 52 JAH 7202 502 52 JAH 7202 632 52 JAH 7202 802 52 JAH 7202 103 52 JAH 7202 133 52
72 50
1279875584434261916108.23.8
Case size
3216
Case code
52
L W T
3.2±0.2 1.6±0.2 1.4 max 0.6±0.2
P
P
L
W
T
DIMENSIONSMain body : CeramicsTerminal : Tin plating (mm)
Size 3216
a
b
c
-3-
No. Item Performance Test method
Apply rated current.
Apply 100% of rated current.
Breaking voltage : Rated voltageBreaking current : 50 A
Apply rated current.
Apply 200% of rated current. (Ambient temperature : 10 ~ 30°C) Insulation resistance between terminals and case (ceramics) Board supporting width : 90 mmBending speed : Approx. 0.5 mm/sDuration : 5 sBending : 3 mmApplied force : 20 NDuration : 10 sTool : R0.5Direction of the press : side faceSupporting dimension : 1.6 mmApplied force : 20 NDuration : 10 sTool : R0.5Direction of the press : thickness direction of productSolder : Sn–3Ag–0.5CuTemperature : 245 ± 3°Cmeniscograph methodSolder : JISZ3282 H60A, H60S, H63ATemperature : 230 ± 2°Cmeniscograph methodSolder : Sn–3Ag–0.5CuTemperature : 245 ± 3°CDipping : 3 sSolder : JISZ3282 H60A, H60S, H63ATemperature : 230 ± 2°CDipping : 3 sDipping (1 cycle)
Preconditioning : 100 ~ 150°C, 60 sTemperature : 265 ± 3°C, 6 ~ 7 s (260 ± 3°C, 10 s)
Reflow soldering (2 cycles)Preconditioning : 1-2 m, lower than 180°CPeak : 250 ± 5°C, 5 sHolding : 230 ~ 250°C, 30 ~ 40 sCooling : More than 2 m
Manual soldering (2 cycles)Temperature : 350 ± 10°CDuration : 3 ~ 4 sMeasure after 1 h left under room temperature and humidity.
Dipping rinseSolvent : Isopropyl alcoholDuration : 90 s
Frequency range : 10 ~ 55 ~ 10 Hz/mVibration amplitude : 1.5 mmDuration : 2 h in each of XYZ directions (total : 6 h)Peak value : 490 m/s2
Duration : 11 ms 6 aspects × 3 times (total : 18 times)–55 ± 3°C : 30 mRoom temperature : 2 ~ 3 m or less125 ± 2°C : 30 mRoom temperature : 2 ~ 3 m or lessRepeat above step for 10 cyclesTemperature : 85 ± 3°CHumidity : 85 ± 5% RHDuration : 1000 hTemperature : 85 ± 2°CApplied current : Rated current × 70%Duration : 1000 hTemperature : 85 ± 3°CHumidity : 85 ± 5% RHApplied voltage : rated current × 70% Duration : 1000 hTemperature : 125 ± 2°CDuration : 1000 h
Temperature rise shall not exceed 75°C.
Shall not open within 1 hour.
Arc shall not be continued.Marking shall be legible.
Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Fusing within 1 minute
1000 MΩ or more
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
Solder Wetting time : within 3s
The dipping surface of the terminals shall be covered more than 95% with new solder.
Marking shall be legible.No mechanical damage.Resistance change after the test shall be within ± 20%.
Marking shall be legible.No mechanical damage.No significant irregularity in the appearance.
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%. No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
No mechanical damage.Resistance change after the test shall be within ± 20%.
Temperature rise
Current-carrying capacity
Clearing characteristics
Voltage drop
Fusing characteristics Insulation resistance
Electrode strength(Flexibility)
Shear test
Substrate bending test
Solderability(Solder Wetting time)
Solderability(new uniform coating of solder)
Resistance to soldering heat
Solvent resistance
Vibration
Shock
Thermal shock
Moisture resistance
Load life
Moisture resistance load
Stability
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
a ac
b
Name
Fuse element
Space
Arc extinction
material
Terminal
Body
Marking
Internal solder
Material, standard, and treatment
Lead-free alloy
—
Silicone resin
Tin plating
Ceramics
Epoxy resin
Lead-free alloy
1.0
1.6
1.6
(mm)
(Reflow)
BodyMarking
Space
Arc extinctionmaterial
Fuse element
Internal solder
100 mm
33 mm
10 mm
1.4 mm
Glass epoxy body on one side
Board thickness : 1.6 mm
Copper layer : 70 µm
MARKING CONSTRUCTION
Code : Rated current
1.0 A1.25 A1.6 A2.0 A2.5 A
3.15 A
102132162202252322
: : : : : :
Code : Rated current
4.0 A 5.0 A 6.3 A 8.0 A10.0 A12.5 A
402502632802103133
: : : : : :
Terminal
PERFORMANCE
RECOMMENDED PAD DIMENSIONS STANDARD TEST BODY
-4-
FUSING CHARACTERISTICS I2T-T CHARACTERISTICS
DISTRIBUTION OF FUSING CHARACTERISTICS DISTRIBUTION OF FUSING TIME
JAH 7202 632NA52
Applied current (A)1 10 100 1000
0.01
0.1
1
10
Fus
ing
time
(s)
0.0001
0.001
100
JAH 7202 632NA52
Numbers of pcs
Fus
ing
time
(s)
0.0001
0.001
0.01
0.1
1
10
200% rated current is applied
400% rated current is applied
0 20 40 60 80 100
Reference Reference
1 1000
Applied current (A)
10 100
Fus
ing
time
(s)
0.0001
0.001
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10
Fusing time (s)
0.0001 100
Joul
e in
tegr
al (
A2 s
)
1
10
100
1000
10000
0.01
0.1
100000
5.0
A6.
3 A
3.15
A4.
0 A
2.5
A2.
0 A
8.0
A10
.0 A
12.5
A
1.6
A1.
25 A
1.0
A
3.15 A
2.0 A2.5 A
4.0 A5.0 A6.3 A8.0 A10.0 A12.5 A
1.6 A
1.0 A1.25 A
-5-
Fig. A : Inrush current waveform
1 ms
40 A
Der
atin
g fa
ctor
Temperature (°C)
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE (TYPE JAH)
Determine the rated value of the micro fuse, and select the correct circuit protection element for your circuit. If you select the correct circuit protection element, safety of your circuit can be ensured.How to determine the rated value of the circuit protection element is described below:
Flow for fuse selection1. Measurement of circuit values
using actual device
2. Calculation from operating current
3. Calculation from overload current
4. Calculation from inrush current
5. Final determination of rated value
6. Operation check using actual device
Measure the circuit values, such as operating current of the circuit.
From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable fuse.
From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.
From the inrush current, calculate the minimum rated value to determine the applicable fuse.
From the calculation results of steps 2 through 4, determine the rated value.
After selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual deviceBefore determining the rated value of the fuse, preliminarily measure the following using the actual device.1–1 Operating current
Using an oscilloscope or equivalents, measure the operating current of the circuit.1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.1–3 Inrush current
Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine the number of inrush current applied.
1–4 Category temperatureMeasure the ambient temperature of the fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE JAH<Fuse selection>
Effective operating current : 2.8 AEffective overload current : 40 AInrush current waveform : Fig. A(Pulse width : 1 ms, Wave height : 40 A)Numbers to withstand inrush current : 100,000 timesCategory temperature : 85°C
2. Calculation from operating current2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.Example : Effective operating current = 2.8 A
2–2 Derating1Temperature derating factor
Using Fig. B, find the temperature derating factor correspond to the temperature.2Rated derating factor
Rated derating factor = 0.78 (Constant irrespective of temperature)
Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.Rated current of fuse ≥ Operating current/(1 × 2) ... Formula 1
Example : Category temperature = 85°C, Operating current = 2.8 A1Temperature derating factor = 0.76 (Refer to Fig. B.)2Rated derating factor = 0.78 (Constant irrespective of temperature)Calculation using Formula 1 :Rated current ≥ 2.8/(0.76 × 0.78) = 4.72 A
The above calculation result shows that the fuse with rated current of 4.72 A or more should be selected for this circuit. Type JAH, with rated current of 5.0 A or more can be selected.
Fig. B
JAH temperature derating
-50 -25 0 25 50 75 100 1250
20
40
60
80
100
120
-6-
1ms
40A
3. Calculation from overload current3–1 Measurement of overload current
Using oscilloscope or equivalents, measure the overload current that needs to break the circuit.Example : Effective overload current = 40 A
3–2 Calculation from overload currentDetermine the rated current so that the overload current can be 2.0 times larger than the rated current.Use Formula 2 to calculate the rated current of the fuse.
Rated current of fuse ≤ Overload current/2.0 ... Formula 2
Example : Overload current = 40 AUse Formula 2 to calculate the rated current.Rated current ≤ 40/2.0 = 20 A
The above calculation result shows that the fuse with rated current of 20 A or less should be selected for this circuit.
Type JAH, with rated current of 12.5 A or less can be selected.
4. Calculation from inrush current4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure the waveform of the inrush current of the actual circuit.
4–2 Creation of approximate waveformGenerally, the waveform of inrush current is complicated. For this reason, create the approximate waveform of inrush current as shown on Fig. C to simplify calculation.
4–3 Calculation of I2t of inrush currentCalculate I2t (Joule integral) of the approximate waveform.The formula for this calculation depends on the approximate waveform. Refer to Table A.Example : Pulse applied = 1 ms, Peak value = 40 A
Approximate waveform = Triangular waveSince the approximate waveform is a triangular wave, use the following formula for calculation.I2t of rush current = 1/3 × Im2 × t ... Formula 3 (Im : Peak value, t : Pulse applying time)Use Formula 3 to calculate I2t of the rush current: I2t = 1/3 × 40 × 40 × 0.001 = 0.533 (A2s)
Fig. C : Inrush current waveformRed line : Actual measurement waveformBlack line : Approximate waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
Name Waveform
Trapezoidalwave
Variouswave 1
Variouswave 2
Charge/dischargewaveform
I t2
13I ( )+1 I 2 I –1 I 2
2 tt
13 tIm Im ( )+ +–2
13 Im2
21 t 2 t 1
( )–t 3 t 2
13
13
13+
+ I 12
I 22
( )I –1 I 22
( )–t 2 t 1
I +1 I 2
( )–t 3 t 2
t 1
0 t3t2t1Im
I2
0 t3t2t1
I1
I1I2
0 t
ImIm
0 -t
0.368
i (t) = Im e-t/
12 Im 2
Name Waveform
Sine wave(1 cycle)
Triangularwave
Rectangularwave
I t2
12 tIm 2
12 tIm 2
13 tIm 2
I 2 20t
tIm 2
Sine wave(half cycle)
Following formula is generally used for calculation of I2t as i(t) equal to current.
t = ∫ (t)dt
Table A
i
0 1 2
tIm
0 tIm
0
Im
0 tIm
t2
-7-
100
1000
10000
100000
10
1
1000000
Num
ber
of p
ulse
res
ista
nce
(cyc
le)
4–4 Search of load ratio1Set up the number of cycles to withstand. (generally
100,000 times)2Obtain the load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current applied.
The load ratio is 10% or less from Fig. D.
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard I2t for the fuse to be used.
Standard I2t of fuse > (I2t of inrush current/load ratio) .......... ..........Formula 4
Example : I2t of pulse = 0.533 A2s, Pulse applied = 1 ms, Required load ratio = 10%
From Formula 4,Standard I2t of fuse > 0.533/0.1 = 5.33 (A2s)
The standard I2t of the fuse should be 5.33 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection of 1 ms (horizontal axis) and 5.33 A2s (vertical axis) from Fig. E (refer to the arrow shown in Fig. E).
Select a fuse whose curve is above the intersection. Type JAH, with rated current of 6.3 A or more should be selected.
5. Final determination of rated valueDetermine the rated current of the micro fuse. The rated current should meet all the calculation results.
Example : 6.3 A meets the all requirement.
6. Operation check using actual deviceAfter selecting the rating, confirm if the device works properly under the pre-determined conditions.
Fig. D
PULSE RESISTANCE CHARACTERISTICS
Load ratio (%)
10 20 30 40 50 60 70 80 900 100
Fig. E
JOULE INTEGRAL VS. FUSING TIME
Fusing time (s)
0.001 0.01 0.1 1 100.0001 100
Joul
e in
tegr
al (
A2 s
)
1
100
10
1000
0.01
0.1
100000
10000
3.15 A
2.0 A2.5 A
4.0 A5.0 A6.3 A8.0 A10.0 A12.5 A
1.6 A
1.0 A1.25 A
-8-
Application Notes for Micro Fuse1. Circuit Design
Micro Fuse should be designated only after confirming operating conditions and the Micro Fuse performance characteristics.When determining the rated current, be sure to observe the following items :
(1) Micro Fuse should always be operated below the rated current (the value considered in the temperature derating rate) and voltage specifications.
(2) Micro Fuse should always be operated below the rated voltage.
(3) Micro Fuse should be selected with correct rated value to be fused at overload current.
(4) When Micro Fuse are used in inrush current applications, please confirm sufficiently inrush resistance of Micro Fuse.
(5) Please do not apply the current exceeding the breaking current to Micro Fuse.
(6) Use Micro Fuse under the condition of category temperature.
(7) Micro Fuse should not be used in the primary power source.
Micro Fuse should be selected by determining the operating conditions that will occur after final assembly, or estimating potential abnormalities through cycle testing.
2. Assembly and MountingDuring the entire assembly process, observe Micro Fuse body temperature and the heating time specified in the performance table. In addition, observe the following items :
(1) Mounting and adjusting with soldering irons are not recommendable since temperature and time control is difficult.In case of emergency for using soldering irons, be sure to observe the conditions specified in the performance table.
(2) Micro Fuse body should not have direct contact with a soldering iron.
(3) Once Micro Fuse mounted on the board, they should never be remounted on boards or substrates.
(4) During mounting, be careful not to apply any excessive mechanical stresses to the Micro Fuse.
3. SolventsFor cleaning of Micro Fuse, immersion in isopropyl alcohol for 90 seconds (at 20 ~ 30°C liquid temp.) will not be damaged.If organic solvents (Pine AlphaTM, Techno CareTM, Clean ThroughTM, etc.) will be applied to the Micro Fuse, be sure to preliminarily check that the solvent will not damage the Micro Fuse.
4. Ultrasonic CleaningUltrasonic cleaning is not recommended for Micro Fuse.This may cause damage to the Micro Fuse such as broken terminals which results in electrical characteristics effects, etc. depending on the conditions.If Ultrasonic cleaning process must be used, please evaluate the effects sufficiently before use.
5. Caution During Usage (1) Micro Fuse with electricity should never be touched. Micro
Fuse with electricity may cause burning due to the Micro Fuse high temperature. Also, in case of touching Micro Fuse without electricity, please check the safety temperature of Micro Fuse.
(2) Protective eyeglasses should always be worn when performing fusing tests. However, there is a fear that Micro Fuse will explode during test. During fusing tests, please cover particles not to fly outward from the board or testing fixture. Caution is necessary during usage at all times.
6. Environmental Conditions (1) Micro Fuse should not be operated in acid, alkali, or active
gas atmosphere. (2) Micro Fuse should not be vibrated, shocked, or pressed
excessively. (3) Micro Fuse should not be operated in a flammable or
explosive atmosphere. (4) After mounting Micro Fuse on a board, covering Fuses with
resin may affect to the electric characteristics of the Micro Fuse. Please be sure to evaluate it in advance.
7. EmergencyIn case of fire, smoking, or offensive odor during operation, please cut off the power in the circuit or pull the plug out.
8. Storage (1) Micro Fuse should be stored at room temperature (-10°C ~
+40°C) without direct sunlight. Direct sunlight may cause decolorization and deformation of the exterior and taping.Also, there is a fear that solderability will be remarkably lower in high humidity.
(2) If the products are stored for an extended period of time, please contact Matsuo Sales Department for recommendation. The longer storage term causes packages and tapings to worsen. If the products are stored for longer term, please contact Matsuo Sales Department for advice.
(3) The products in taping, package, or box should not be given any kind of physical pressure. Deformation of taping or package may affect automatic mounting.
9. DisposalWhen Micro Fuse are disposed of as waste or “scrap”, they should be treated as “industrial waste”. Micro Fuse contain various kinds of metals and resins.
10. SamplesMicro Fuse received as samples should not be used in any products or devices in the market. Samples are provided for a particular purpose such as configuration, confirmation of electrical characteristics, etc.
The specifications on this catalog are subject to change without prior notice. Please inquire of our Sales Department to confirm the specifications prior to use.
Overseas Sales Dep. :
USA :
Head Office :
URL :
5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan
Matsuo Electronics of America, Inc. 2134 Main Street, Suite 200, Huntington Beach, CA 92648
5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan
http://www.ncc-matsuo.co.jp/
Please feel free to ask our sales department for more information on the Micro Fuse.
Tel : 06-6332-0883
Tel : 714-969-2491
Tel : 06-6332-0871
Fax : 06-6332-0920
Fax : 714-960-6492
Fax : 06-6331-1386
Type JAH L Series micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electric
circuit around battery, etc. because the demand for high capacity batteries is increasing.
Wire material is adopted for fuse element, and the performance against rush current is improved in spite of compact design.
Also, the ecology design of Type JAH L Series is environmentally friendly because of its complete lead-free.
1. Our original terminal construction eliminates Tombstone phenomenon.
2. Our original construction design provides excellent fusing and quick acting characteristics.
3. Especially, performance against rush current is excellent since wire material is used for fuse element.
4. Surface temperature rise is 75°C or less when applying rated current for fusing. This gives little influence to the peripheral units.
5. Small size of 3216 ( 3.2×1.6×1.2mm )
6. Suitable for automatic mounting
7. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”.
8. Resistance to soldering heat: Flow soldering 10 seconds at 260°C and Reflow soldering 5 seconds at 250°C respectively.
9. A tape carrier of 8 mm width will be provided as a standard package material.
10. Complete lead-free
FEATURES
CATALOG NUMBERS AND RATING
August, 2010
RATING
ORDERING INFORMATION
Type JAH L Series
J A H L 3 2 0 2 1 0 3 N A 5 2
Type Series Code RV Code Rated current Code Rated current Code Package type Code Case size
202 2.0 A 632 6.3 A NA φ180 Reel 52 3.2×1.6
252 2.5 A 802 8.0 A
322 3.15A 103 10.0 A402 4.0 A 133 12.5 A
502 5.0 A
JAH 3202 32VL
Voltage drop
mV
(Max.)
JAH L 3202 202 52 3.2×1.6 2.0 58 200
JAH L 3202 252 52 3.2×1.6 2.5 44 200
JAH L 3202 322 52 3.2×1.6 3.15 34 200
JAH L 3202 402 52 3.2×1.6 4.0 26 200
JAH L 3202 502 52 3.2×1.6 5.0 22 200
JAH L 3202 632 52 3.2×1.6 6.3 16 160
JAH L 3202 802 52 3.2×1.6 8.0 10 150
JAH L 3202 103 52 3.2×1.6 10.0 8.2 120
JAH L 3202 133 52 3.2×1.6 12.5 3.8 80
For the taping type, the packing code “NA” will be entered in .
Catalog numbers are approved by UL and cUL. (File No.E170721)
32 50
Catalog number Case size
Internal resistance
mΩ
(Typical)
Breaking current
A
Rated current
A
Rated voltage
VDC
Item
Category Temperature Range
Rated Current
Rated Voltage
Voltage Drop
Insulation Resistance
(between terminals and case)
Fusing Characteristics
Cleaning CharacteristicsBreaking current : 50 A
32VDC
Rating
-40 ~+125°C
Fusing within 1 minute if the current is 200% of rated current.
2.0-2.5-3.15-4.0-5.0-6.3-8.0-10.0-12.5A
Breaking voltage : 32 V
Refer to the list of standard products.
1000 MΩ or more
1
CONSTRUCTION
STANDARD TEST BOARD
MARKING
RECOMMENDED PAD DIMENSIONS
DIMENSIONS
(mm)
a 1.0
b 1.6
c 1.6
(Reflow)
Size 3216
100mm
33mm
1.4mm
Glass epoxy body on one side
Board thickness:1.6mm
Copper layer:70m
10mmGlass epoxy body on one side Board thickness:1.6mm Copper layer:70m
L
W 103
T
P
Main body : Ceramics
Terminal : Tin plating (mm)
Case size Case code L W T P
3216 52 3.2 ± 0.2
1.6 ± 0.2 1.2max. 0.6
± 0.2
Code : Rated current Code : Rated current
202 : 2.0A
252 : 2.5A
322 : 3.15A
402 : 4.0A
502 : 5.0A
632 : 6.3A
802 : 8.0A
103 : 10.0A
133 : 12.5A
Name Material, standard, and treatment
Fuse element Lead-free alloy
Arc extinction
materialSilicone resin
Terminal Tin plating
Body Ceramics
Marking Laser printing
Internal solder Lead-free alloy
Terminal
Body
103
Marking
Internal solder
Arc extinction material
Fuse element
2
No. Item Performance Test method
1 Temperature rise Temperature rise shall not exceed 75°C. Apply rated current.
2 Current-carrying capacity Shall not open within 1 hour. Apply 100% of rated current.
3 Clearing characteristics Arc shall not be continued. Marking shall be legible.
Breaking voltage : Rated voltage Breaking current : 50 A
4 Voltage drop Voltage drop is below the value specified in CATALOG NUMBERS AND RATING.
Apply rated current.
5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current. (Ambient temperature : 10 ~ 30°C)
6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case (ceramics)
7 Electrode strength (Bending)
No mechanical damage. Resistance change after the test shall be within ± 20%.
Board supporting width : 90 mm Bending speed : Approx. 0.5 mm/sec. Duration : 5 sec. Bending : 3 mm
8 Shear test No mechanical damage. Resistance change after the test shall be within ± 20%.
Applied force : 20 N Duration : 10 sec. Tool : R0.5 Direction of the press : side face
9 Substrate bending test No mechanical damage. Resistance change after the test shall be within ± 20%.
Supporting dimension : 1.6 mm Applied force : 20 N Duration : 10 sec. Tool : R0.5 Direction of the press : thickness direction of product
10 Solderability (Solder Wetting time) Solder Wetting time : within 3sec.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C meniscograph method
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C meniscograph method
11 Solderability (new uniform coating of solder)
The dipping surface of the terminals shall be covered more than 95% with new solder.
Solder : Sn–3Ag–0.5Cu Temperature : 245 ± 3°C Dipping : 3 sec.
Solder : JISZ3282 H60A, H60S, H63A Temperature : 230 ± 2°C Dipping : 3 sec.
12 Resistance to soldering heat Marking shall be legible. No mechanical damage. Resistance change after the test shall be within ± 20%.
Dipping (1 cycle) Preconditioning : 100 ~ 150°C, 60 sec. Temperature : 265 ± 3°C, 6 ~ 7 sec.
(260 ± 3°C, 10 sec.) Reflow soldering (2 cycles)
Preconditioning : 1-2 m, lower than 180°C Peak : 250 ± 5°C, 5 sec. Holding : 230 ~ 250°C, 30 ~ 40 sec. Cooling : More than 2 min.
Manual soldering (2 cycles) Temperature : 350 ± 10°C Duration : 3 ~ 4 sec. Measure after 1 hour left under room temperature and humidity.
13 Solvent resistance Marking shall be legible. No mechanical damage. No significant irregularity in the appearance.
Dipping rinse Solvent : Isopropyl alcohol Duration : 90 sec.
14 Vibration No mechanical damage. Resistance change after the test shall be within ± 20%.
Frequency range : 10 ~ 55 ~ 10 Hz/m Vibration amplitude : 1.5 mm Duration : 2 hours in each of XYZ directions (total : 6 hours)
15 Shock No mechanical damage. Resistance change after the test shall be within ± 20%.
Peak value : 490 m/s2
Duration : 11 m sec. 6 aspects × 3 times (total : 18 times)
16 Thermal shock No mechanical damage. Resistance change after the test shall be within ± 20%.
–55 ± 3°C : 30 min. Room temperature : 2 ~ 3 min or less 125 ± 2°C : 30 min. Room temperature : 2 ~ 3 min or less Repeat above step for 10 cycles
17 Moisture resistance No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Duration : 1000 hours
18 Load life No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 2°C Applied current : Rated current × 70% Duration : 1000 hours
19 Moisture resistance load No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 85 ± 3°C Humidity : 85 ± 5% RH Applied voltage : rated current × 70% Duration : 1000 hours
20 Stability No mechanical damage. Resistance change after the test shall be within ± 20%.
Temperature : 125 ± 2°C Duration : 1000 hours
PERFORMANCE
3
FUSING CHARACTERISTICS
I2T - T CHARACTERISTICS
DISTRIBUTION OF FUSING CHARACTERISTICS
DISTRIBUTION OF FUSING TIME
参考値 参考値
JAH L 3202 632NA52 JAH L 3202 632NA52
12.5
A10A
8.0
A
5.0
A6.3
A
4.0
A3.1
5A
2.5
A2.0
A
0.0001
0.001
0.01
0.1
1
10
100
1 10 100 1000
Applied current (A)
Fu
sin
g tim
e (
s)
Joule
intr
gra
l (A
2s)
12.5
A
10.0
A
8.0
A
5.0A
6.3
A
4.0A3.15A2.5A
2.0A
0.01
0.1
1
10
100
1000
10000
0.0001 0.001 0.01 0.1 1 10 100
Fusing time (s)
0.0001
0.001
0.01
0.1
1
10
100
1 10 100 1000
Applied current (A)
Fu
sin
g tim
e (
s)
0.0001
0.001
0.01
0.1
1
10
0 5 10 15
200% rated current is applied
400% rated current is applied
Numbers of pcs
Fusin
g t
ime
(se
c)
4
Determine rated value of micro fuse, and select correct circuit protection element for your circuit. If you select correct circuit protection element, safety of your circuit can be ensured. How to determine rated value of circuit protection element is described below:
Flow for fuse selection
1. Measurement of circuit values using actual device
Measure circuit values, such as operating current of circuit.
2. Calculation from operating current
From obtained operating current and the category temperature, calculate minimum rated value to determine applicable fuse.
3. Calculation from overload current
From obtained overload current, calculate the maximum rated value to determine applicable fuse.
4. Calculation from inrush current
From inrush current, calculate minimum rated value to determine applicable fuse.
5. Final determination of rated value
From the calculation results of steps 2 through 4, determine rated value.
6. Operation check using actual device
After selecting rating, confirm if device works properly under pre-determined conditions.
Fuse selection
1. Measurement of circuit values using actual device
Before determining rated value of fuse, preliminarily measure following condition by using the actual device.
1–1 Operating current
Using an oscilloscope or equivalents, measure operating current of circuit.
1–2 Overload current
Using an oscilloscope or equivalents, measure the overload current that needs to break circuit.
1–3 Inrush current
Using an oscilloscope or equivalents, measure inrush current of circuit at power-on or power-off. In addition, determine
number of inrush current applied.
1–4 Category temperature
Measure ambient temperature of fuse circuit.
EXAMPLE TO SELECT RATINGS OF TYPE JAH L Series
<Fuse selection>
Effective operating current : 2.8 A
Effective overload current : 40 A
Inrush current waveform : Fig. A
(Pulse width : 1 ms, Wave height : 40 A)
Numbers to withstand inrush current : 100,000 times
Category temperature : 85°C
2. Calculation from operating current
2–1 Measurement of operating current
Using an oscilloscope or equivalents, measure operating current (effective current) of actual circuit.
Example : Effective operating current = 2.8 A
2–2 Derating
①Temperature derating factor
Using Fig. B, find temperature derating factor correspond to temperature.
②Rated derating factor
Rated derating factor = 0.78 (Constant irrespective of temperature)
Use Formula 1 to calculate rated current of the fuse to be used for circuit.
Rated current of fuse ≥ Operating current/(①×②) ... Formula 1
Example : Category temperature = 85°C, Operating current = 2.8 A
①Temperature derating factor = 0.76 (Refer to Fig. B.)
②Rated derating factor = 0.78 (Constant irrespective of temperature)
Calculation using Formula 1 :
Rated current ≥ 2.8/(0.76×0.78) = 4.72 A
The above calculation result shows that the fuse with rated current of 4.72 A or more should be selected for this circuit.
Type JAH L Series, with rated current of 5.0 A or more can be selected.
DETERMINATION OF RATED VALUE AND SELECTION OF MICRO FUSE ( TYPE JAH L Series )
1ms
40A
Fig. A : Inrush current waveform
0
20
40
60
80
100
120
-50 -25 0 25 50 75 100 125
Temperature()
Dera
ting f
acto
r (%
)
JAHL temperature
derating
Fig. B
5
3. Calculation from overload current
3–1 Measurement of overload current
Using oscilloscope or equivalents, measure overload current that needs to break circuit.
Example : Effective overload current = 40 A
3–2 Calculation from overload current
Determine rated current so that overload current can be 2.0 times larger than rated current.
Use Formula 2 to calculate rated current of fuse.
Rated current of fuse ≤ Overload current/2.0 ... Formula 2
Example : Overload current = 40 A
Use Formula 2 to calculate the rated current.
Rated current ≤ 40/2.0 = 20 A
The above calculation result shows that the fuse with rated current of 20 A or less should be selected for this circuit.
Type JAH L Series, with rated current of 12.5 A or less can be selected.
4. Calculation from inrush current
4–1 Measurement of inrush current waveform
Using an oscilloscope or equivalent, measure waveform of inrush
current of actual circuit.
4–2 Creation of approximate waveform
Generally, waveform of inrush current is complicated. For this reason,
create the approximate waveform of inrush current as shown on Fig. C to
simplify calculation.
4–3 Calculation of 2t of inrush current
Calculate 2t (Joule integral) of approximate waveform.
The formula for this calculation depends on the approximate waveform.
Refer to Table A.
Example : Pulse applied = 1 ms, Peak value = 40 A
Approximate waveform = Triangular wave
Since the approximate waveform is a triangular wave, use the
following formula for calculation.
2t of rush current = 1/3 × m2 × t ... Formula 3
(m : Peak value, t : Pulse applying time)
Use Formula 3 to calculate 2t of the rush current:
2t = 1/3 × 40 × 40 × 0.001 = 0.533 (A2s)
* Following formula is generally used for calculation of 2t as i(t) equal to current.
2 t=∫0ti2(t)dt
Name Waveform 2 t Name Waveform
2 t
Sine wave
(1 cycle )
Trapezoidal
wave
Sine wave
(half cycle)
Various
wave 1
Triangular
wave
Various
wave 2
Rectangular
wave
Charge/
discharge
waveform
JOULE-INTEGRAL VALUES FOR EACH WAVEFORM
1ms
40A
Fig. C : Inrush current waveform
Red line : Actual measurement waveform
Black line : Approximate waveform
Table A
m
t 0 1
2
t
m
0
0 t2
m
0 t
m
0 -t τ
i (t) = m e-t/τ m
0.368 m
2
1 t1+12+ (1-2) 2
(t2-t1)+ 2
2 (t3-t2)
1
3
1
3 1
3
1
3 m2
t
m2 t
1
2
m2 t
1
2
m2 t
t2 t3
m
0 t1
t
2
0
1
t2 0 t1 t3
2 1
m2 τ 1
2
1 2 t + (1-2) 2 t
1
3
1
3 m2
t1 + m2 (t2-t1) +
m2 (t3-t2)
1
3
6
4–4 Search of load ratio
①Set up number of cycles to withstand. (generally
100,000 times)
②Obtain load ratio from Pulse resistance characteristics.
(Fig. D)
Example : 100,000 times is required against inrush current
applied.
The load ratio is 10% or less from Fig. D.
4–5 Calculation from Joule integral and load ratio
Use Formula 4 to calculate the standard 2t for the fuse to be
used.
Standard 2t of fuse > (2t of inrush current/load ratio) ..........
..........Formula 4
Example : 2t of pulse = 0.533 A2s,
Pulse applied = 1 ms, Required load ratio = 10%
From Formula 4,
Standard 2t of fuse > 0.533/0.1 = 5.33 (A2s)
The standard 2t of the fuse should be 5.33 (A2s) or more.
Since the rush pulse applied is 1 ms, obtain the intersection
of 1 ms (horizontal axis) and 5.33 A2s (vertical axis) from Fig.
E (refer to the arrow shown in Fig. E).
Select a fuse whose curve is above the intersection. Type JAH
L Series, with rated current of 6.3 A or more should be selected.
5. Final determination of rated value
Determine the rated current of micro fuse. Rated
current should meet all the calculation results.
Example : Rated current of 6.3 A~12.5A meets the all requirement.
6. Operation check using actual device
After selecting rating, confirm if the device works properly
under pre-determined conditions.
PULSE RESISTANCE CHARACTERISTICS
JOULE INTEGRAL VS. FUSING TIME
Fig. D
Fig. E
Nu
mb
er
of
pu
lse
re
sis
tan
ce
(cycle
)
10
100
1000
10000
100000
1000000
0 10 20 30 40 50 60 70 80 90 100
Load ratio (%)
Fusing time (s)
5.0A
6.3
A
4.0A
3.15A2.5A
2.0A
0.01
0.1
1
10
100
1000
10000
0.0001 0.001 0.01 0.1 1 10 100
Joule
inte
gra
l (A
2s)
8.0
A
10.0
A12.5
A
7
Specifications on this catalog are subject to change without prior notice. Please inquire of our Sales
Department to confirm specifications prior to use.
Please feel free to ask our sales department for more information on the Micro Fuse.
Overseas Sales Dep. 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0883 Fax : 06-6332-0920
Head off ice 5-3,3-Chome,Sennari-cho,Toyonaka-shi,Osaka 561-8558,Japan Tel : 06-6332-0871 Fax : 06-6331-1386
URL http://w w w .ncc-matsuo.co.jp/
R
MATSUOMATSUO ELECTRIC CO., LTD.
Application Notes for Micro Fuse1. Circuit Design 5. Caution During Usage Micro Fuse should be designated only after confirming (1) Micro Fuse with electricity should never be touched. Micro
operating conditions and the Micro Fuse performance Fuse with electricity may cause burning due to the Micro
characteristics. Fuse high temperature. Also, in case of touching Micro
When determining the rated current, be sure to observe the Fuse without electricity, please check the safety
following items : temperature of Micro Fuse.
(1) Micro Fuse should always be operated below the rated (2) Protective eyeglasses should always be worn when
current (the value considered in the temperature derating performing fusing tests. However, there is a fear that Micro
rate) and voltage specifications. According to item 2,2-2 Fuse will explode during test. During fusing tests, please
in page 5. cover particles not to fly outward from the board or testing
(2) Micro Fuse should always be operated below the rated fixture. Caution is necessary during usage at all times.
voltage.
(3) Micro Fuse should be selected with correct rated value to 6. Environmental Conditions be fused at overload current. (1) Micro Fuse should not be operated in acid, alkali, or active
(4) When Micro Fuse are used in inrush current applications, gas atmosphere.
please confirm sufficiently inrush resistance of Micro Fuse. (2) Micro Fuse should not be vibrated, shocked, or pressed
(5) Please do not apply the current exceeding the breaking excessively.
current to Micro Fuse. (3) Micro Fuse should not be operated in a flammable or
(6) Use Micro Fuse under the condition of category explosive atmosphere.
temperature. (4) After mounting Micro Fuse on a board, covering Fuses with
(7) Micro Fuse should not be used in the primary power source. resin may affect to the electric characteristics of the Micro
Fuse. Please be sure to evaluate it in advance.
Micro Fuse should be selected by determining the
operating conditions that will occur after final assembly, or 7. Emergency estimating potential abnormalities through cycle testing. In case of fire, smoking, or offensive odor during operation,
please cut off the power in the circuit or pull the plug out.
2. Assembly and Mounting During the entire assembly process, observe Micro Fuse 8. Storage body temperature and the heating time specified in the (1) Micro Fuse should be stored at room temperature (-10°C ~
performance table. In addition, observe the following items : +40°C) without direct sunlight. Direct sunlight may cause
(1) Mounting and adjusting with soldering irons are not decolorization and deformation of the exterior and taping.
recommendable since temperature and time control is Also, there is a fear that solderability will be remarkably
difficult. lower in high humidity.
In case of emergency for using soldering irons, be sure to (2) If the products are stored for an extended period of time,
observe the conditions specified in the performance table. please contact Matsuo Sales Department for
(2) Micro Fuse body should not have direct contact with a recommendation. The longer storage term causes
soldering iron. packages and tapings to worsen. If the products are stored
(3) Once Micro Fuse mounted on the board, they should never for longer term, please contact Matsuo Sales Department
be remounted on boards or substrates. for advice.
(4) During mounting, be careful not to apply any excessive (3) The products in taping, package, or box should not be
mechanical stresses to the Micro Fuse. given any kind of physical pressure. Deformation of taping
or package may affect automatic mounting.
3. Solvents For cleaning of Micro Fuse, immersion in isopropyl alcohol 9. Disposal for 90 seconds (at 20 ~ 30°C liquid temp.) will not be When Micro Fuse are disposed of as waste or “scrap”, they
damaged. should be treated as “industrial waste”. Micro Fuse contain
If organic solvents (Pine AlphaTM
, Techno CareTM
, Clean various kinds of metals and resins.
ThroughTM
, etc.) will be applied to the Micro Fuse, be sure
to preliminarily check that the solvent will not damage the 10. Samples Micro Fuse. Micro Fuse received as samples should not be used in any
products or devices in the market. Samples are provided
4. Ultrasonic Cleaning for a particular purpose such as configuration, confirmation
Ultrasonic cleaning is not recommended for Micro Fuse. of electrical characteristics, etc.
This may cause damage to the Micro Fuse such as broken
terminals which results in electrical characteristics effects,
etc. depending on the conditions.
If Ultrasonic cleaning process must be used, please
evaluate the effects sufficiently before use.
8