Omron A5 Catalogue 2007 1-282

COMPONENTSCatalogue 2007

Omron cat cover 07 europe 11/9/06 10:06 am Page 1

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Text

2007 Catalogue

Omron A5 Catalogue 2007 1-282 11/9/06 10:16 am Page 1

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Contents

Welcome to the 2007 Omron Catalogue 8 - 9

Section 1 POWER RELAYS 10 - 160

Technical Information Power & Signal Relays 10 - 32

Selection Guide 33 - 44

G5NB-E 45 - 48

G5SB 49 - 51

G6M 52 - 54

G6D 55 - 58

G6DS 59 - 62

G6B 63 - 70

G2RG 71 - 74

G5Q-EU 75 - 78

G6RN 79 - 82

G5LE 83 - 87

G5LB 88 - 91

G5CA 92 - 95

G6C 96 - 104

G2R 105 - 120

G2RL 121 - 125

G5RL 126 - 129

G4W 130 - 135

G8P 136 - 141

G4A 142 - 145

G9EA-1 146 - 152

G9EC-1 153 - 160

Section 2 SIGNAL RELAYS 161 - 282


G5V-1 170 - 172

G6E 173 - 177

G6L 178 - 186

G6H 187 - 192

G6J-Y 193 - 202

G6K 203 - 212

G6S 213 - 221

G5A 222 - 225

G5V-2 226 - 230

G6A 231 - 239

G6Y 240 - 245

G6K(U)-2F-RF 246 - 249

G6Z 250 - 265

G6W 266 - 273

G9YA 274 - 282

Section 3 SOLID STATE RELAYS 283 - 315

Technical Information 283 - 287


Contents

Continued on next page

3


G3R/RD 293 - 296

G3M 297 - 300

G3MB 301 - 303

G3MC 304 - 308

G3S/G3SD 309 - 312

G3DZ 313 - 315

Section 4 MOSFET RELAYS 316 - 419



4-Pin Relays

G3VM-61A1/D1 328 - 329

G3VM-351/A/D 330 - 331

G3VM-353A/A1/D/D1 332 - 333

G3VM-401A/D 334 - 335

G3VM-61G1 336 - 337

G3VM-81G1 338 - 339

G3VM-201G 340 - 341

G3VM-351G 342 - 343

G3VM-351GL 344 - 345

G3VM-353G/G1 346 - 347

G3VM-401G 348 - 349

G3VM-21GR 350 - 351

G3VM-21GR1 352 - 353

G3VM-41GR5 354 - 355

G3VM-41GR6 356 - 357

G3VM-61GR1 358 - 359

G3VM-21LR 360 - 361

G3VM-21LR1 362 - 363

G3VM-41LR5 364 - 365

G3VM-41LR6 366 - 367

6-Pin Relays

G3VM-61B1/E1 368 - 369

G3VM-61BR/ER 370 - 371

G3VM-351B/E 372 - 373

G3VM-353B/B1/E/E1 374 - 375

G3VM-401B/E 376 - 377

G3VM-401BY/EY 378 - 379

G3VM-601BY/EY 380 - 381

G3VM-61H1 382 - 383

G3VM-81HR 384 - 385

G3VM-201H1 386 - 387

G3VM-351H 388 - 389

G3VM-353H/H1 390 - 391


4

Contents

G3VM-401H 392 - 393

8-Pin relays

G3VM-22CO/FO 394 - 395

G3VM-61CR/FR 396 - 397

G3VM-62C1/F1 398 - 399

G3VM-352C/F 400 - 401

G3VM-354C/C1/F/F1 402 - 403

G3VM-355C/CR/F/FR 404 - 405

G3VM-402C/F 406 - 407

G3VM-62J1 408 - 409

G3VM-202J1 410 - 411

G3VM-352J 412 - 413

G3VM-354J/J1 414 - 415

G3VM-355J/JR 416 - 417

G3VM-402J 418 - 419

Section 5 GENERAL PURPOSE RELAYS 420 - 494



MY 429 - 441

LY 442 - 454

G2RS 455 - 464

G7L 465 - 479

G7J 480 - 488

G7SA 489 - 494

AUTOMOTIVE RELAYS

For details please visit our website www.europe.omron.com/ocb

Section 6 - MICROSWITCHES 495 - 657



Non-Sealed Switches

D3V 519 - 535

V 536 - 550

VX 551 - 557

D2MC 558 - 562

SS 563 - 570

SS-P 571 - 576

SSG 577 - 584

D2F 585 - 590

D2A 591 - 594

D2MQ 595 - 599

D3C 600 - 603

Sealed Switches

D2VW 604 - 609


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Contents

Continued on next page

DR2W 610 - 613

D2SW 614 - 619

D2SW-P 620 - 628

D2HW 629 - 636

D2JW 637 - 641

Door Interlock Switches

D2D 642 - 649

D3D 650 - 653

D2T 654 - 657

Section 7 - DIP SWITCHES 658 - 686



A6H 665 - 666

A6T/A6S 667 - 669

A6D/A6DR 670 - 672

A6E/A6ER 673 - 675

A6A 676 - 679

A6C/A6CV 680 - 682

A6R/A6RV 683 - 686

Section 8 - TACTILE SWITCHES 687 - 727



B3F 695 - 703

B3W 704 - 707

B3FS 708 - 710

B3SN 711 - 712

B3S 713 - 714

B3WN 715 - 716

B3J 717 - 719

B3DA 720 - 721

B3D 722 - 725

B32 726 - 727

Section 9 - PHOTOMICROSENSORS 728 - 915



Transmissive

EE-SX1107/1108/1109/1131 749 - 756

EE-SX1018 757 - 759

EE-SX1103 760 - 762

EE-SX1105 763 - 765

EE-SX4134 766 - 770

EE-SX493 771 - 773

EE-SX1055 774 - 776

EE-SX1046 777 - 779


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Contents

EE-SX1082 780 - 782

EE-SX1106 783 - 785

EE-SX199 786 - 788

EE-SX398/498 789 - 791

EE-SV3 792 - 794

EE-SX1071 795 - 797

EE-SX1096 798 - 800

EE-SX1088 801 - 803

EE-SH3 804 - 806

EE-SX3088/4088 807 - 809

EE-SG3/EE-SG3-B 810 - 812

EE-SX1057 813 - 815

EE-SX1128 816 - 818

EE-SX1041 819 - 821

EE-SX1042 822 - 824

EE-SX1081 825 - 827

EE-SX1235A-P2 828 - 830

EE-SX3009-P1/EE-SX4009-P1 831 - 833

EE-SX3019-P2/EE-SX4019-P2 834 - 836

EE-SX3081/EE-SX4081 837 - 839

EE-SX4235A-P2 840 - 842

EE-SX1070 843 - 845

EE-SX3070/4070 846 - 848

EE-SX1140 849 - 851

EE-SX461-P11 852 - 855

Reflective

EE-SY124/EE-SY125 871 - 874

EE-SY193 875 - 879

EE-SY171 880 - 882

EE-SY169A 883 - 885

EE-SY169B 886 - 888

EE-SY113 889 - 891

EE-SY313/413 892 - 895

EE-SYSF5 (-B) 896 - 898

EE-SY110 899 - 901

EE-SY310/410 902 - 905

Actuator

EE-SA102 856 - 858

EE-SA103 859 - 861

EE-SA104 862 - 864

EE-SA107-P2 865 - 867

EE-SA407-P2 868 - 870

Micro Displacement

Z4D-B01 906 - 909


7

Contents

Multi-Beam

EY3A-1081 910 - 912

EY3A-112 913 - 915

Section 11 - INTELLIGENT SENSORS 916 - 956

Tilt Sensors

D6B 916 - 918

D7E-3 (MEMS) 919 - 920

Pressure Sensor

D8M-D82 (MEMS) 921 - 922

Flow Sensors

D6AN 923 - 925

D6F-01A1/02A1/05N2 (MEMS) 926 - 930

D6F-03A3 (MEMS) 931 - 934

D6F-10A5/20A5/50A5 (MEMS) 935 - 939

D6F-10A6/20A6/50A6 (MEMS) 935 - 939

D6F-W01A1/04A1 (MEMS) 940 - 943

D6F-V03A1 (MEMS) 944 - 947

Touch Sensor

B6TS 948 - 956

Section 12 - CONNECTORS 957


Selection Guide 960

FPC Connectors

XF2C 962 - 963

XF2B 964 - 965

XF2R 966 - 967

XF2M 968 - 969

XF2L 970 - 972

XF2J 973 - 974

XF2U 975 - 976

PCB Connectors

XH3 Stacking 977 - 981

XH3 Board to Board 982 - 990

XH2 991 - 997

XC5 998 - 1013

XG4 1014 - 1031

XG8 1032 - 1036

XJ8/XG8S/XG8T 1037 - 1041

XM3-L/XM2-L/XM4K/XM4L 1042 - 1049

XM4M 1050 - 1051

XM7 1052 - 1054

XR2 1055 - 1065

Section 13 - PART NUMBER INDEX 1066 - 1068

Terms & Conditions 1069 -1071


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Text

This edition of the Omron Electronics Components

catalogue not only introduces a wealth of new

solutions, especially in the touch control and connector

fields, but is also the first where every single

component is entirely Lead and Cadmium free.

Omron has not used the extension to the RoHS

deadline for eliminating Cadmium from switch

contacts. We have developed and fully evaluated

alternative contact materials that have no effect on

performance, specification or price. Customers

specifying our switches and other components

today are assured that no further changes to product

design or specification are required in order to meet

the current European RoHS directive.

Undoubtedly the biggest single product innovation

presented in this guide is the B6TS capacitative

touch sensor, aimed at any kind of control

application from building automation to consumer

goods. It can be integrated into a surface of any

shape, in almost any non-conducting material -

eliminating the need to compromise appearance

to accommodate controls.

Omron Electronic Components Catalogue 2007


9

Text

Omron has significantly expanded the range of PCB

connectors for European markets, providing

reliable, high performance interconnect in a

constrained environment. New versions of our

popular FPC range widen its applications, bringing

more compact sizes as well as adding an

alternative assembly method. Also new is our

range of XG4 IDC flat cable connectors, that

require just one operation to mate.

These are just two of the many areas where our

product range has expanded over the last year.

Signal relays, power relays, RF relays, sensors,

MOSFET relays, switches and other components

are all being continuously developed and improved,

with new version addressing new market needs as

they emerge. To stay up to date, please use the

news section of our website or contact your local sales

representative.

Omron Electronic Components Europe B.V. reserves theright to make any changes to the specifications,technical information and data of the componentsdescribed in this catalogue at its sole discretion withoutprior notice

Although we do strive for perfection, Omron ElectronicComponents Europe B.V. does not warrant or make anyrepresentations regarding the correctness or accuracyof the specifications, technical information and data ofthe components as described in this catalogue.

www.omroncomponents.com

ue 2007


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Technical Information Relays

Relay Classification

SEALING

Unsealed RelaysRelays of this type are intended for manual soldering. Nomeasures are taken against penetration of flux and cleaningsolvent into the relay. This type of relay cannot be immersion-cleaned.Flux-protection RelaysSpecial design construction prevents flux from penetrating intothe relay housing, for example, due to capillary action up theterminals when the relay is soldered onto a PCB. This type of relayalso cannot be immersion-cleaned.

Fully Sealed RelaysFully sealing prevents not only flux, but also cleaning solvent frompenetrating into the relay housing. Therefore, this type of relaycan be immersion-cleaned. Relays are each tested before beingshipped. The relay is immersed in fluorocarbon solution for1 minute, at a temperature of 70C +5C/-0C, to see if gasesescape from the relay. The following figure illustrates the testconditions.

Construction

Relay

Fluorocarbon solution

50 mm

Ex.) 70 C

Model Mounting Enclosure Ratings Features

Discrete Unsealed Designed for manual solderingG4W

G2R

G6A

G6S

Flux protection Design inhibits flux intrusion into the casing frothe terminals during soldering.

Fully sealed Sealed resin casings and covers, limiting damagefrom corrosive atmospheres.

Surface mounting Surface mounting relays permit automatic reflow soldering.

Classification Unsealed Flux protection

Construction

Automatic flux application Poor Poor Good Good

Automatic soldering Poor Poor Good Good

Automatic cleaning Poor Poor Poor Poor

Manual soldering Good Good Good Good

Penetration of dust Fair Fair

Penetration of Poor Poorcorrosive gas

Terminals separated from PCB

Contacts located at upper part of relay case

Terminals separated from PCB

Press-fit terminals

Resin seal Terminals separated from PCB

0.3 mm min. base thickness

Inserted terminals

Terminals are separatedfrom PCB surface whenrelay is mounted.

Features Contacts are positionedaway from base.

Terminals are pressedinto base.

Terminals are insertedinto base 0.3 mm min.thick.


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SINGLE-SIDE STABLE RELAYS (STANDARD)

The contacts of this simple type of relay momentarily turn ON andOFF, depending on the excitement state of the coil.

DOUBLE-WINDING, LATCHING RELAYS

This latching relay has two coils: set and reset. It can retain theON or OFF states even when a pulsating voltage is supplied, orwhen the voltage is removed.

SINGLE-WINDING, LATCHING RELAYS

Unlike the double-winding latching relay, the single-windinglatching relay has only one coil. This coil, however, serves as boththe set and reset coils, depending on the polarity (direction) ofcurrent flow. When current flows through the coil in the forwarddirection, it functions as a set coil; when current flows through thecoil in the reverse direction, it functions as a reset coil.

BUILT-IN DIODE

A diode is built into some relays, wired in parallel with the coil toabsorb the counterelectromotive force (counter emf) generated bythe coil.BUILT-IN OPERATION INDICATOR

Some relays are provided with a light-emitting diode (LED), wiredin parallel with the coil. This permits a fastcheck of the relaysoperating status.

Operation

Classification Fully Sealed Surface Mounting

Construction

Automatic flux application Good Good

Automatic soldering Good Good

Automatic cleaning Good Good

Manual soldering Good Good

Penetration of dust Good Good

Penetration of Good Goodcorrosive gas

Resin sealGlue padResin seal

Press-fit terminals

Terminals are separated from PCB surfacewhen relay is mounted.

Features Terminal and base, as well as the base andcasing, are sealed with adhesive; the L-shapedterminals and adhesive pads allow temporaryfixing to the board.

Terminal Arrangement/ Internal Connections (Bottom View)

Mounting orientation mark



S: Set coilR: Reset coil

S R



S: Set coilR: Reset coil

S R

PC

B R

elay

s


12


Contact ratings are generally indicated according to resistiveloads and inductive loads (cos = 0.4 or L/R = 7 ms). Contactshape and material are also shown to guide the customer inselection of a model suitable for the intended load and requiredservice life.

When used at extremely low loads, the failure rate differsaccording to the contact material and contact method, as shownin the figure. For example, in comparing a single contact pointwith a bifurcated contact point, the bifurcated contact model hashigher parallel redundancy and will therefore exhibit a lower failurerate.

Contacts

Failure Rate vs. Load Current

Failu

re r

ate

(10

/o

pera

tion)

6

Gold-platedsingle contract

Gold-plated bifurcated contact

Gold-clad bifurcated crossbar contact

10 VDC (constant)

Load current (mA)

STRAIGHT PCB TERMINALS

PCB terminals are normally straight.Self-clinching (S-shaped) PCB TerminalsSome relays have terminals that are bent into an S shape. Thissecures the PCB relay to the PCB prior to soldering, helping theterminals stay in their holes and keeping the relay level.

Terminals

For miniature relays, the maximum dimensions and the averagevalues ( ) marked with an asterisk are provided to aid the customerin designing.

Dimensions

Terminal

Quick-connect Terminals

16 max. (15.9)*

8 max. (7.9)* 0.3

3.5

0.60.4 x 0.4

9.9 max. (9.8)*

7.62

0.25

*Average value


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MOUNTING ORIENTATION MARK

On the top of all OMRON relays is a mark indicating where therelay coil is located. Knowing the coil location aids in designingPCBs when spacing components. Also, pin orientation is easy todiscern when automatic or hand-mounting relays.

On dimensional drawings in all OMRON literature this mark is left-oriented. Mounting holes, terminal arrangements, and internalconnections follow this alignment. The following two symbols areused to represent the orientation mark.

TERMINAL ARRANGEMENT/INTERNAL CONNECTIONS

Top ViewIf the terminal arrangement of a relay can be seen from above thePCB, the top view of the relay is provided in the Dimensions sectionof the catalog or data sheet.

Bottom ViewIf the relays terminals cannot be seen from above the PC board, asin this example, a bottom view is shown.

Rotation Direction to Bottom ViewThe bottom view shown in the catalog or data sheet is rotated in thedirection indicated by the arrow, with the coil always on the left.

Moving Loop SystemIn the U.S.A., the National Association of Relay Manufactures(NARM) in April 1984, awarded OMRON for monumentaladvances in relay technology, as embodied in the Moving LoopSystem.

This unique relay construction maximizes electrical andpermanent magnet energy. A high-efficiency magnet adds to themagnetic flux of the relay coil, which also allows for tighterpacking of relay parts. Relays having such a coil are known aspolarized relays. Details of construction are shown below.

The moving loop design has similarities with polarized relays;however, the following two features make for a large performancedistinction.

A permanent magnet is placed in the vicinity of the workinggaps. The flux energy of this permanent magnet complementsthat of the electrical coil. This increased efficiency enables themechanism holding the contacts closed to ultimately switch largerloads, and at the same time reduces the power consumed by thecoil.

The following diagram shows concentric lines of magnetic fluxwhen the permanent magnet is placed near the working gap.

CONVENTIONAL RELAY COIL

The following diagram shows the lines of magnetic flux when thepermanent magnet is placed away from the working gap. Theselines of flux detract from the total strength of the coil.

When the switching voltage is removed from the coil, the collapseof the magnetic flux created by the permanent magnet and theelectrical coil provides the force to return the relay contacts to thereset position. Note the flux path and magnet polarity in theillustration overleaf.

Mark

Armature Permanent magnet

Air gap

Core

Movable contact

Yoke

Core

Permanent magnet

Air gap

Permanent magnet

Air gap

Axis of rotation

Drawing Bottom Topview

Detail Mounting holes Terminal arrangement/ internal connections

Symbol

Example

Mark

(Bottom view)

Mark

(Bottom view)

PC

B R

elay

sP

CB

Rel

ays


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Release

Transition fromrelease to operation(operating voltagesupplied)

Operation

Permanent magnet

Repulsion

Movement

Attraction

Release

Transition fromrelease to operation(operating voltagesupplied)

Operation

Released status is maintained by permanent magnet.

N

S

RepulsionAttraction

The armature seesaws due to the attraction and repulsion torque exerted on the armature by the coil voltage and the permanent magnet.

N

S

N

S

Energized status is maintained by the coil voltage and permanent magnet.

NS

N

S

Super Moving Loop SystemA very small high-sensitivity magnetic circuit is incorporated tofurther minimize the conventional moving loop system.

This magnetic circuit has the following features:1. High-efficiency polarized magnetic circuit utilizes power of

both attraction and repulsion.2. Balanced armature system improves resistance to both

vibration and impacts.3. Ideal mechanism for a low-profile relay.

Armature

Permanent magnet

Core

Coil

Axis of rotation

N

S

Note: The above applies to a latching relay.

TERMS RELATED TO CONTACTS

Carry CurrentThe value of the current which can be continuously applied to therelay contacts without opening or closing them, and which allowsthe relay to stay within the permissible temperature rise.Maximum Switching CurrentA current which serves as a reference in determining theperformance of the relay contacts. This value will never exceedthe current flow. When using a relay, do not exceed this value.Contact FormOMRON uses the following relay terminology for the variouspolarity and switch configurations.SPST-NO (Single-pole, single-throw, normally open)SPST-NC (Single-pole, single-throw, normally close)SPDT (or changeover contact) (single-pole, double-throw)DPDT (Double-pole, doublethrow)Contact Symbols

NO NC DT (NO/NC) MBB

Make-before-break (MBB) ContactA contact arrangement in which part of the switching section isshared between both an NO and NC contact. When the relayoperates or releases, the contact that closes the circuit operatesbefore the contact that opens the circuit releases. Thus bothcontacts are closed momentarily at the same time.

Contact ResistanceThe total resistance of the conductor, as well as specificresistivities such as of the armature and terminal, and theresistance of the contacts. This value is determined by measuringthe voltage drop across the contacts by applying test currents asshown in the table below.

Test Current

Rated current or switching current Test current (mA)

Less than 0.01 1

0.01 or higher but less than 0.1 10

0.1 or higher but less than 1 100

1 or higher 1,000

To measure the contact resistance, a milliohmmeter can also beused, although the accuracy drops slightly.

Glossary

A: AmmeterV V lt t

Contact sample

Power source

(DC or AC)

R

A: AmmeterV: VoltmeterR: Variable resistor

MilliohmmeterRelay

COMProbe

NC

Operating Principle


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Maximum Switching PowerThe maximum value of the load capacity which can be switchedwithout problem. When using a relay, do not exceed this value.For example, when maximum switching voltage V1 is known,maximum switching current I1 can be obtained at the point ofintersection on the characteristic curve Maximum SwitchingPower shown below. Conversely, maximum switching voltage V1can be obtained if I1 is known.

The life expectancy of the relay can be determined from theEndurance curve shown below, based on the rated switchingcurrent (I1) obtained above. For instance, the electrical enduranceat the obtained maximum switching current of 2 A is slightly over300,000 operations (see circled point on graph below).

However, with a DC load, it may become difficult to break thecircuit of 48 V or more due to arcing. Determine the suitability ofthe relay in actual usage testing.The correlation between the contact ratings is shown in thefollowing figure:

Failure RateThe failure rate indicates the lower limit of switching capability ofa relay as the reference value. Such minute load levels are foundin microelectronic circuits. This value may vary, depending onoperating frequency, operating conditions, expected reliabilitylevel of the relay, etc. It is always recommended to double-checkrelay suitability under actual load conditions. In this catalog, the failure rate of each relay is indicated as areference value. It indicates failure level at a reliability level of 60%(60).60=0.1x 10

-6/operation means that one failure is presumedto occur per 10,000,000 (ten million) operations at a reliability levelof 60%.Number of PolesThe number of contact circuits. See Contact Form for reference.TERMS RELATED TO COILS

Rated Coil VoltageA reference voltage applied to the coil when the relay is usedunder normal operating conditions.Coil Symbols

Coil Resistance (Applicable to DC-switching Relays only)The resistance of the coil is measured at a temperature of 23Cwith a tolerance of 10% unless otherwise specified. (The coilresistance of an AC-switching type relay may be given forreference when the coil inductance is specified.)Hot StartThe ratings set forth in the catalog or data sheet are measured ata coil temperature of 23C.Maximum VoltageThe maximum value of the pulsating voltage fluctuations in theoperating power supply to the relay coil.Minimum Pulse WidthThe minimum value of the pulsating voltage required to set andreset a latching relay at a temperature of 23C.Must Operate (Must Set) VoltageThe threshold value of a voltage at which a relay operates whenthe input voltage applied to the relay coil in the reset state isincreased gradually.

Single-sided Double-windingstable Latching

Polarised Non- w/4 w/3polarised terminals terminals

Maximum switching current (I1) =

Maximum switching voltage (V1) =

For instance, if the maximum switching voltage = 40 VMaximum switching current = 2 A (see circled point on graph below.)

Max. switching power [W(VA)]

Max. switching voltage (V1)

Max. switching power [W(VA)]

Max. switching current (I1)

Maximum Switching Power

Switching voltage (V)

Sw

itchi

ng c

urre

nt (

A)

AC resistive load

Max. switching voltage

DC resistive load

Max. switching power (DC)Max. switching power (AC)

DC (L/R = 7 ms)/AC (cosf = 0.4) induc-tive load

Max. switching current

Maximum Switching Power

Switching voltage (V)

Sw

itchi

ng c

urre

nt (

A)

AC resistive load

AC induc-tive load (cosf = 0.4)

ACresistive load

DC induc-tive load (L/R = 7 ms)

Endurance

Switching current (A)

End

uran

ce (

x10

ope

ratio

ns)

3

24-VDCresistive load

24-VDCinductive load

110-VACinductive load

110-VACresistive load

Single-windinglatching

+

+

+

S R +

+

S R +

+

S R

PC

B R

elay

s


16


Must Release (Must Reset) VoltageThe threshold value of a voltage at which a relay releases whenthe rated input voltage applied to the relay coil in the operatingstate is decreased gradually.Power ConsumptionThe power (= rated voltage x rated current) consumed by the coilwhen the rated voltage is applied to it. A frequency of 60 Hz isassumed if the relay is intended for AC operation. The currentflows through the coil when the rated voltage is applied to the coilat a temperature of 23C. The tolerance is +15%/-20% unlessotherwise specified.TERMS RELATED TO ELECTRICAL CHARACTERISTICS

Dielectric StrengthThe critical value which a dielectric can withstand withoutrupturing when a high-tension voltage is applied for 1 minutebetween the following points:Between coil and contactBetween contacts of different polarityBetween contacts of same polarityBetween set coil and reset coilBetween current-carrying metal parts and ground terminalNote that normally a leakage current of 3 mA is detected;however, a leakage current of 1 mA to 10 mA may be detected onoccasion.Electrical EnduranceThe life of a relay when it is switched at the rated operatingfrequency with the rated load applied to its contacts.High-frequency Isolation (Applicable to High-frequency Relayonly)The degree of isolation of a high-frequency signal, which isequivalent to the insulation resistance of ordinary relays.

The following characteristics are measured with contactsunrelated to the measurement terminated at 50, when a signal isapplied from input terminal 11 to output terminal 8 or from inputterminal 11 to output terminal 14 of the sample.1. Isolation characteristics2. Insertion loss characteristics3. Return lossThe following conversion formula converts from return loss toVSWR.

High-frequency Switching Power (Applicable to High-frequency Relays Only)The power of a high-frequency signal that can be switched.

Highfrequency Transmitted Power (Applicable to High-frequency Relays Only)The transmission capacity of a high-frequency signal.Impulse Withstand VoltageThe critical value which the relay can withstand when the voltagesurges momentarily due to lightning, switching an inductive load,etc. The surge waveform which has a pulse width of 1.2 x 50 sis shown below:

Insertion Loss (Applicable to High-frequency Relays Only)The attenuation of a high-frequency signal in a transmission lineand is equivalent to the contact resistance of ordinary relays.Insulation ResistanceThe resistance between an electric circuit such as the contactsand coil, and grounded, non-conductive metal parts such as thecore, or the resistance between the contacts. The measuredvalues are as follows:

Rated insulation voltage Measured value

60 V max. 250 V

61 V min. 500 V

Maximum Operating FrequencyThe frequency or intervals at which the relay continuouslyoperates and releases, satisfying the rated mechanical andelectrical endurance.Mechanical EnduranceThe life of a relay when it is switched at the rated operatingfrequency without the rated load.Operate Bounce TimeThe bounce time of the normally open (NO) contact of a relaywhen the rated coil voltage is applied to the relay coil at anambient temperature of 23C.Operate TimeThe time that elapses after power is applied to a relay coil until theNO contacts have closed, at an ambient temperature of 23C.Bounce time is not included. For the relays having an operate timeof less than 10 ms, the mean (reference) value of its operate timeis specified as follows:

Operate time 5 ms max. (mean value: approx. 2.3 ms)

Release Bounce TimeThe bounce time of the normally closed (NC) contact of a relaywhen the coil is de-energized at an ambient temperature of 23C.Release TimeThe time that elapses between the moment a relay coil is de-energized until the NC contacts have closed, at an ambienttemperature of 23C. (With a relay having SPST-NO or DPST-NOcontacts, this is the time that elapses until the NO contacts haveoperated under the same condition.) Bounce time is not included.For the relays having an operate time of less than 10 ms, themean (reference) value of its operate time is specified as follows:

Release time 5 ms max. (mean value: approx. 2.3 ms)

50- termination resistances

G5Y-154P

HP8505Anetwork analyzer HP8501A

storage normalizer

HP8502Atransmission test set

OUT IN OUT

where,x = return loss

1 10VSWR =

1 + 10 20x

20x

Time (ms)

Sur

ge v

olta

ge (

%)

Peak value


17


Precautions

Reset Time (Applicable to Latching Relays Only)The time that elapses from the moment a relay coil is de-energized until the NC contacts have closed, at an ambienttemperature of 23C. (With a relay having SPST-NO contacts, thisis the time that elapses until the NO contacts have operated underthe same condition.) Bounce time is not included. For the relayshaving a reset time of less than 10 ms, the mean (reference) valueof its reset time is specified as follows:

Reset time 5 ms max. (mean value: approx. 2.3 ms)

Set TimeThe time that elapses after power is applied to a relay coil until theNO contacts have closed, at an ambient temperature of 23C.Bounce time is not included. For the relays having a set time ofless than 10 ms, the mean (reference) value of its set time isspecified as follows:

Reset time 5 ms max. (mean value: approx. 2.3 ms)

Shock ResistanceThe shock resistance of a relay is divided into two categories:Destruction which quantifies the characteristic change of, ordamage to, the relay due to considerably large shocks which maydevelop during the transportation or mounting of the relay, andMalfunction which quantifies the malfunction of the relay whileit is in operation.Stray CapacitanceThe capacitance measured between terminals at an ambienttemperature of 23C and a frequency of 1 kHz.VSWR (Applicable to High-frequency Relays Only)Stands for voltage standing-wave ratio. The degree of reflectedwave that is generated in the transmission line.Vibration ResistanceThe vibration resistance of a relay is divided into two categories:Destruction which quantifies the characteristic changes of, ordamage to, the relay due to considerably large vibrations whichmay develop during the transportation or mounting of the relay,and Malfunction which quantifies the malfunction of the relaydue to vibrations while it is in operation.a = 0.002f2Awhere,a: Acceleration of vibrationf: FrequencyA: Double amplitude

Basic InformationBefore actually committing any component to a mass-productionsituation, OMRON strongly recommends situational testing, in asclose to actual production situations as possible. One reason is toconfirm that the product will still perform as expected aftersurviving the many handling and mounting processes in involvedin mass production. Also, even though OMRON relays areindividually tested a number of times, and each meets strictrequirements, a certain testing tolerance is permissible. When ahigh-precision product uses many components, each dependsupon the rated performance thresholds of the other components.Thus, the overall performance tolerance may accumulate intoundesirable levels. To avoid problems, always conduct testsunder the actual application conditions.GENERAL

To maintain the initial characteristics of a relay, exercise care thatit is not dropped or mishandled. For the same reason, do notremove the case of the relay; otherwise, the characteristics maydegrade. Avoid using the relay in an atmosphere containingsulphuric acid (SO2), hydrogen sulphide (H2S), or other corrosivegases. Do not continuously apply a voltage higher than the ratedmaximum voltage to the relay. Never try to operate the relay at avoltage and a current other than those rated.If the relay is intended for DC operation, the coil has polarity.Connect the power source to the coil in the correct direction. Donot use the relay at temperatures higher than that specified in thecatalog or data sheet.The storage for the relay should be in room temperature andhumidity.

COIL

1) AC-switching RelaysGenerally, the coil temperature of the AC-switching relay riseshigher than that of the DC-switching relay. This is because ofresistance losses in the shading coil, eddy current losses in themagnetic circuit, and hysteresis losses. Moreover, a phenomenonknown as beat may take place when the AC-switching relayoperates on a voltage lower than that rated. For example, beatmay occur if the relays supply voltage drops. This often happenswhen a motor (which is to be controlled by the relay) is activated.This results in damage to the relay contacts by burning, contactweld, or disconnection of the selfholding circuit. Therefore,countermeasures must be taken to prevent fluctuation in thesupply voltage.One other point that requires attention is the inrush current.When the relay operates, and the armature of the relay is releasedfrom the magnet, the impedance drops. As a result, a currentmuch higher than that rated flows through the coil. This current isknown as the inrush current. (When the armature is attracted tothe magnet, however, the impedance rises, decreasing the inrushcurrent to the rated level.) Adequate consideration must be givento the inrush current, along with the power consumption,especially when connecting several relays in parallel.

Double-winding latching

Single-winding latching

Contact

Magnetic circuit

Min. set pulse width

Min. reset pulse width

Set coil

Set

Reset

Set time Reset time

Reset coil

PC

B R

elay

s


18


2) DC-switching RelaysThis type of relay is often used as a so-called marginal relay thatturns ON or OFF when the voltage or current reaches a criticalvalue, as a substitute for a meter. However, if the relay is used inthis way, its control output may fail to satisfy the ratings becausethe current applied to the coil gradually increases or decreases,slowing down the speed at which the contacts move. The coilresistance of the DC-switching relay changes by about 0.4% perdegree C change in the ambient temperature. It also changeswhen the relay generates heat. This means that the must operateand must release voltages may increase as the temperature rises.Coil switching voltage SourceIf the supply voltage fluctuates, the relay will be caused tomalfunction regardless of whether the fluctuation lasts for a longtime or only for a moment. For example, assume that a large-capacity solenoid, relay, motor,or heater is connected to the same power source as the relay, orthat many relays are used at the same time. If the capacity of thepower source is insufficient to operate these devices at the sametime, the relay may not operate, because the supply voltage hasdropped. Conversely, if a high voltage is applied to the relay (evenafter taking voltage drop into account), chances are that the fullvoltage will be applied. As a consequence, the relays coil willgenerate heat. Therefore, be sure 1) to use a power source withsufficient capacity and 2) that the supply voltage to the relay iswithin the rated must operate voltage range of the relay.Minimum Must Operate VoltageWhen the relay is used at a high temperature, or when the relaycoil is continuously energized, the coil temperature rises and coilresistance increases. Consequently, the must operate voltageincreases. This increase in the must operate voltage requiresattention when determining the minimum must operate voltageare given below for reference when designing a power sourceappropriate for the relay.Assuming a coil temperature rise of 10C, the coil resistance willincrease about 4%. The must operate voltage increases asfollows:Rated values of Model LZN2 taken from catalog or data sheetRated voltage: 12 VDCCoil resistance: 500Must operate voltage: 80% max. of rated voltage at 23C coiltemperatureThe rated current that flows through this relay can be obtained bydividing the rated voltage by the coil resistance. Hence,

12 VDC 500 = 24 mAHowever, the relay operates at 80% maximum of this ratedcurrent, i.e., 19.2 mA (= 24 mA x 0.8). Assuming that the coiltemperature rises by 10C, the coil resistance increases 4% to520 (= 500 x 1.04). The voltage that must be applied to therelay to flow a switching current of 19.2 mA x 520 = 9.98 V. Thisvoltage, which is at a coil temperature of 33C (= 23C + 10C), is83.2% of the rated voltage (= 9.98 V 12 V). As is evident fromthis, the must operate voltage increases when the coiltemperature rises, in this example, 10C from 23C.

The minimum must operate voltage can be determined by thisexpression.

where,E (V): Rated coil voltageEpv (%): Must operate voltageTa: Coil temperature for determining Epv (20C, unless otherwisespecified)T (C): Ambient operating temperatureET (V): Minimum must operate voltageNote: In the above expression, T is taken to be the result of

energization of the coil, when the coil temperature is thesame as the ambient temperature.

Coil Temperature vs.Must Operate/release Voltage (LZN)

Ambient temperature (C)

Per

cent

age

agai

nst r

ated

val

ue (

%)

Must operate voltage

Must release voltage

Coil voltage: 24 VDCN = 10 (mean value)

ET > E x x ( + 1) [V]Epv + 5

100T - Ta

234.5 + Ta

Coil InputTo guarantee accurate and stable relay operation, the first andforemost condition to be satisfied is the application of the ratedvoltage to the relay. Additionally, the rated voltage in light of thetype of the power source, voltage fluctuation, and changes in coilresistance due to temperature rise. If a voltage higher than therated maximum voltage is applied to the coil for a long time, layershort-circuiting and damage to the coil by burning may takeplace.Coil Temperature RiseWhen a current flows through the coil, the coils temperature risesto a measurable level, because of copper loss. If an alternatingcurrent flows, the temperature rises even more, due not only tothe copper loss, but additionally to the iron loss of the magneticmaterials, such as the core. Moreover, when a current is appliedto the contact, heat is generated on the contacts, raising the coiltemperature even higher (however, with relays whose switchingcurrent is rated at 2 A or lower, this rise is insignificant).

Temperature Rise by Pulsating VoltageWhen a pulsating voltage having an ON time of less than 2minutes is applied to the relay, the coil temperature rise varies,and is independent of the duration of the ON time, depending onlyon the ratio of the ON time to the OFF time. The coil temperaturein this case does not rise as high as when a voltage iscontinuously applied to the relay.

Energization time Release temperature rise

Continuous energization 100%

ON:OFF = 3:1 approx. 80%



(V)1:1

(t)


19


Changes in Must Operate Voltage by Coil Temperature RiseThe coil resistance of a DC-switching relay increases (as the coiltemperature rises) when the coil has been continuously energized,de-energized once, and then immediately energized again. Thisincrease in the coil resistance raises the voltage value at which therelay operates. Additionally, the coil resistance rises when therelay is used at a high ambient temperature.Maximum Must Operate VoltageThe maximum voltage applicable to a relay is determined inaccordance with the coil temperature rise and the coil insulationmaterials heat resistivity, electrical as well as mechanical life,general characteristics, and other factors.If a voltage exceeding the maximum voltage is applied to therelay, it may cause the insulation materials to degrade, the coil tobe burnt, and the relay to not operate at normal levels. Actually,however, there are occasions when the maximum voltage isexceeded to compensate for fluctuation in the supply voltage. Inthis event, pay attention to the following points.The coil temperature must not exceed the temperature that thespool and wound wire constituting the coil can withstand. Thefollowing table shows the wires often used for a coil. In this table,the coil temperature is measured through calculation of the coilresistance.

Wire material Maximum coil temperature

Polyurethane (UEW) 120C

Polyester (PEW) 130C

How to Calculate Coil Temperature

where,R1 (): coil resistance before energizationR2 (): coil resistance after energizationT1 (C): coil temperature (ambient) before energizationt (C): coil temperature after energizationBefore using the relay confirm that there are no problems.DC Input Power SourcePay attention to the coil polarity of the DC-switching relay. Powersources for DC-operated relays are usually a battery or a DCpower supply, either with a maximum ripple of 5%. If power issupplied to the relay via a rectifier, the must operate and mustrelease voltages vary with the ripple percentage. Therefore, checkthe voltages before actually using the relay. If the ripplecomponent is extremely large, beat may occur. If this happens, itis recommended that a smoothing capacitor be inserted asshown in the following diagram.

If the voltage applied to the DC-operated coil increases ordecreases slowly, each contact of a multi-pole contact relay maynot operate at the same time. It is also possible for this situationto result in the must operate voltage varying each time the relayoperates. Either way, circuit sequencing will not be correct. Incritical applications, the use of a Schmitt circuit is recommendedto reshape the DC waveform to trigger all contacts of the relay atthe same time.Relay Driving Signal WaveformA long rise time and/or fall time of the signal driving the relay mayprolong the operate time and/or release time of the relay. Thissituation may shorten the life of the contacts. If this situationcannot be avoided, providing a Schmitt trigger circuit at the circuitstage preceding the relay circuit will shape a waveform with sharptransitions, as shown in the following diagram:

If the Schmitt trigger circuit is configured of transistors, a residualvoltage may exist in the output of the circuit. Therefore, confirmthat the rated voltage is present across the relay coil, or that theresidual voltage drops to zero when the relay releases. When anIC (e.g., TC74HC132P) is used, this value is close to zero.Cyclic Switching of AC Load

If the relay operates in synchronization with the supply voltage,the life of the relay may be shortened. When designing the controlsystem in which the relay is used, estimate the life of the relay andthus the reliability of the overall system under actual operatingconditions. Moreover, construct the circuit so that the relayoperates in a random phase or in the vicinity of the zero point.

t = (234.5+T1) + T1 [C]R2 - R1

R1

Smoothing capacitorRipple component

DC component

Relay

E min.E max. E mean

where,E max.: maximum value of ripple componentE min.: minimum value of ripple componentE mean: mean value of DC component

Ripple percentage = Emax. - Emin.Emean

100

Waveform shaping circuit

(Schmitt circuit with inverter)

Driver circuit

Vin Vout

Contact

Vin

Vout

IC

IB

TE

Vin

EAC

Vin

EAC

LOAD

PC

B R

elay

s


20


Dark Current in OFF Time

A circuit that produces a control output as soon as the relayoperates must be carefully designed. In the example on the left,electrode dark current flows as shown when the relay operates.When dark current flows into the relay coil, the relays resistivity toshock and vibration may degrade.Overcoming Beat in DC RelaysWhen using AC power to generate power for operating a DC relay,the use of half-wave rectification causes the formation of apulsating current. Therefore, when the capacitance of thesmoothing capacitor C is low, the relay generates a beat.However, when a bridge rectification circuit is used, the frequencyof the pulsating current doubles, generating no beat even when asmoothing capacitor C is not provided. The bridge rectificationcircuit can provide a higher rectification efficiency to increase thecontact attraction, which is desirable in terms of prolonging theservice life of the contact.

Voltage Considerations for AC RelaysFor stable relay operation, a voltage +10% to -20% of the ratedvoltage should be applied to the relay. The voltage applied to therelay must be a sine wave. When a commercial power source isused, there should be no problem. However, if an AC stabilizedpower source is used, either beat or abnormal heating may occur,depending on the wave distortion of the power source. A shadingcoil is used to suppress beat in an AC current coil, but wavedistortion defeats this function.When a motor, solenoid, transformer, or other device is connectedto the same power line source as the relay controller, and any ofthese devices causes a drop in the line voltage, the relay mayvibrate, damaging the contact. This commonly occurs when asmall transformer is added to the line, when the transformer is toosmall, when long wiring is used, or when thin wiring is used in thecustomers premises. Be aware of this phenomenon, as well asnormal voltage fluctuations. Should this problem occur, check thechange in voltage with a synchroscope or the like, and takeappropriate countermeasures. Effective countermeasures includereplacing the relay with a special relay suited to thecircumstances, or use of a DC circuit and inclusion of a capacitorto compensate for the voltage change, as shown in the followingcircuit diagram.Voltage change compensation circuitincorporating a capacitor

Incorrect

Correct

TE

Io

Incorrect

Correct

100 VAC 50/60 Hz

100 VAC 50/60 Hz

C

C

5FSW

SW

Switch

24 VDC

100 VACC


21


ContactsThe contacts are the most important constituent of a relay. Theircharacteristics are significantly affected by factors such as thematerial of the contacts, voltage and current values applied tothem (especially, the voltage and current waveforms whenenergizing and de-energizing the contacts), the type of load,operating frequency, atmosphere, contact arrangement, andbounce. If any of these factors fail to satisfy predeterminedvalues, problems such as metal deposition between contacts,contact welding, wear, or rapid increase in the contact resistancemay occur.Switching voltage (AC, DC)When a relay breaks an inductive load, a fairly highcounterelectromotive force (counter emf) is generated in therelays contact circuit. The higher the counter emf, the greater thedamage to the contacts. This may result in a significant decreasein the switching power of DC-switching relays. This is because,unlike the AC-switching relay, the DC-switching relay does nothave a zero-cross point. Once arc has been generated, it does noteasily diminish, prolonging the arc time. Moreover, theunidirectional flow of the current in a DC circuit may cause metaldeposition to occur between contacts and the contacts to wearrapidly (this is discussed later).Despite the information a catalog or data sheet sets forth as theapproximate switching power of the relay, always confirm theactual switching power by performing a test with the actual load.Switching CurrentThe quantity of electrical current which flows through the contactdirectly influences the contact characteristics. For example,when the relay is used to control an inductive load such as amotor or a lamp, the contacts will wear more quickly, and metaldeposition between the mating contacts will occur more often asthe inrush current to the contacts increases. Consequently, atsome point the contacts may not be able to open. Contact MaterialsSelection of an appropriate contact material according to the loadto be opened or closed is important. Several contact materialsand their properties are listed below.

Contact Materials and Feature

Contact Protection CircuitA contact protection circuit, designed to prolong the life of therelay, is recommended. This protection will have the additionaladvantages of suppressing noise, as well as preventing thegeneration of carbide and nitric acid, which otherwise would begenerated at the contact surface when the relay contact isopened. However, unless designed correctly, the protection circuitmay produce adverse effects, such as prolonging the release timeof the relay.

P. G. S. This material has excellent corrosion resistanceAlloy and is suitable for very small current circuits.

(Au : Ag : Pt = 69 : 25 : 6)

AgPd This material exhibits good corrosion and sulphurresistance. In a dry circuit, it attracts organic gasto generate a polymer, therefore it is usuallyplated with gold or other material.

Ag This material has the highest electric and heatconductivities among all metals. It exhibits lowcontact resistance, but easily forms sulphide filmin a sulphide gas environment. This may result indefective contact performance at a low-voltagesmall-current operation.

AgNi This material exhibits the same high electricconductivity as silver and excellent arcresistance.

AgSnO2 This material exhibits excellent depositionresistance. It easily forms sulphide film in asulphide gas environment, the same as Agcontact material.

AgSnIn This material exhibits excellent depositionresistance and exhaustion resistance.

AgW This material exhibits a high hardness andmelting point. It also exhibits excellent arcresistance and superior resistance to depositionand transfer. However, it shows high contactresistance and inferior environmental resistance.

PC

B R

elay

s


22


The following table lists examples of contact protection circuits.

Avoid use of a surge suppressor in the manner shown below.

Although it is considered that switching a DC inductive load is more difficult than a resistive load, an appropriate contact protection circuitcan achieve almost the same characteristics.

Circuit example Applicability Features and remarks Element selection

AC DC

CR Fair Good

Good Good

Diode Poor Good

Diode + Poor GoodZenerDiode

Varistor Good Good

Load impedance must be muchsmaller than the RC circuit when therelay operates on an AC voltage.

Optimum C and R values are:C: 1 to 0.5 F for 1A switchingcurrent R: 0.5 to 1 for 1Vswitching voltage

These values do not always agreewith the optimum values due to thenature of the load and thedispersion in the relaycharacteristics. Confirm optimumvalues experimentally. Capacitor Csuppresses discharge when thecontacts are opened, while resistorR limits the current applied whenthe contacts are closed the nexttime. Generally, employ a capacitorC whose dielectric strength is 200to 300 V. If the circuit is powered byan AC power source, employ anAC capacitor (nonpolarized).

The release time of the contacts willbe delayed when a relay solenoid isused as a load. This circuit iseffective if connected across theload when the supply voltage is 24to 48 V. When the supply voltage is100 to 240 V, connect the circuitacross the contacts.

The energy stored in a coil(inductive load) reaches the coil ascurrent via the diode connected inparallel with the coil, and isdissipated as Joule (measurable)heat by the resistance of theinductive load. This type of circuitdelays the release time more thanthe RC type.

This circuit effectively shortensrelease time in applications wherethe release time of a diodeprotection circuit proves to be tooslow.

By utilizing the constant-voltagecharacteristic of a varistor, thiscircuit prevents high voltages frombeing applied across the contacts.This circuit also somewhat delaysthe release time. This circuit, ifconnected across the load, iseffective when the supply voltage is24 to 48 V. If the supply voltage is100 to 240 V, connect the circuitacross the contacts.

The zener diode breakdown voltageshould be about the same as thesupply voltage.

Employ a diode having a reversebreakdown voltage of more than10 times the circuit voltage and aforward current rating greater thanthe load current. A diode having areverse breakdown voltage two tothree times that of the supplyvoltage can be used in an electroniccircuit where the circuit voltage isnot particularly high.

Power source

Inductive load

Inductive load

Power source

Inductive load

Power source

Inductive load

Power source

Inductive load

Power source

This circuit arrangement is very effective for diminishing sparking(arcing) at the contacts, when breaking the circuit. However,since electrical energy is stored in C (capacitor) when thecontacts are open, the current from C flows into the contactswhen they close. Therefore, metal deposition is likely to occurbetween mating contacts.

This circuit arrangement is very useful for diminishing sparking(arcing) at the contacts when breaking the circuit. However, sincethe charging current to C flows into the contacts when they areclosed, metal deposition is likely to occur between the matingcontacts.

Power supply Load

Power supply Load


23


Latching RelaysAvoid use in locations subject to excessive magnetic particles ordust.Avoid use in magnetic fields (over 8,000 A.m).Take measures to preventing problems caused by vibration orshock. Problems may originate from other relay(s) operating orreleasing on the same panel.Avoid simultaneous energization of the set and reset coils, eventhough both coils can be continuously energized.Avoid use under conditions where excessive surge-generatingsources exist in the coil power source.When planning to mount multiple relays together, observe theminimum mounting interval of each type of relay.Drive Circuit (Double-winding Relays G5AK, G6AK, G6BK,etc.)When a DC-switching latching relay is used in one of the circuitsshown in the following diagram, the relay contacts may bereleased from the locked state unless a diode (enclosed in thedotted box in the circuit diagram) is connected to the circuit.Circuits

When connecting a diode to the relay circuit, be sure to use adiode with a repetitive peakinverse voltage, and a DC reversevoltage sufficient to withstand external noise or surge. Also besure that the diode has an average rectified current greater thanthe coil current.If the contact of the relay is used to de-energize the relay, the relaymay not operate normally. Avoid using the relay in a circuit like theone shown below:

PCB DesignSolderingAs demands for more compact electronic devices have grown, sohave demands declined for the plug-in relays that requires a bulkysocket for connection. This trend has lead to the development ofrelays that can be soldered directly onto the PCB. Smaller relayshave made possible great density increases on the PCB, which inturn reduces the size of the product or device. However, unlessthe relay is fully sealed, when soldered onto a PCB, flux maypenetrate into the housing, adversely affecting the internalcircuitry.The following points will help when designing a product whichuses relays. This section points out details to be noted whensoldering a relay to a PCB.

PCB SelectionIn general, relays are directly mounted and soldered onto a PCB.Although seemingly an uninvolved process, soldering and itsrelated processes of flux application, relay mounting, heatapplication, and washing can be detrimental to a relaysperformance. For example, if the PCB were to warp, the internalmechanism of the relay could become distorted, degrading theperformance characteristics. Thus it could be said that the relayscharacteristics are also affected by the size, thickness, andmaterial of the PCB. Therefore, carefully select a PCB that will notjeopardise the performance of the relay.PCB MATERIALS

Generally, the substrate of a PCB is made of glass epoxy (GE),paper epoxy (PE), or paper phenol (PP). Of these, the glass-epoxyor paper-epoxy PCB is recommended for mounting relays. Seethe following table

XL: Latching relay Xb: NC contact of relay

LoadIncorrect Use:

Xb

XL

Circuit connecting two reset coils in parallel.(+)

()

S1 S2 S3

S R S R

D2D1

K1 K2

Circuit connecting two set coils in parallel(+)

()

S1 S2 S3

S R S R

D1

K1 K2

D2

Circuit connecting set coil to reset coil.(+)

()K1 K2

S1 S2 S3

S R S R

D2D1

Circuit connecting set coil of latching relay in parallel with another relay coil.

(+)

()

S1 S2 S4

S R

D

S3

PC

B R

elay

s


24


PCB ThicknessPCBs having a thickness of 0.8, 1.2, 1.6, or 2.0 mm are generallyused. A PCB that is 1.6 mm thick is best for mounting a PCB relay,considering the weight of the relay and the length of the terminals.(The terminal length of OMRON relays is 3, 3.5, or 4.0 to 5.0 mm.)

Terminal Hole Diameter and Land DiameterSelect the appropriate terminal hole and land diameters from thefollowing table, based on the PCB mounting hole drawing. Landdiameters may be reduced to less than those listed below if thethrough-hole connection process is to be employed.Terminal Hole and Land Diameters

Shape of LandsThe land section should be on the center line of the copper-foilpattern, so that the soldered fillets become uniform.

A break in the circular land area will prevent molten solder fromfilling holes reserved for components which must be solderedmanually after the automatic soldering of the PCB is complete.

Conductor Width and ThicknessThe following thickness of copper foil are standard: 35 m and70 m. The conductor width is determined by the current flow andallowable temperature rise. Refer to the chart below.

Conductor PitchThe conductor pitch on a PCB is determined according to theinsulation resistance between conductors and the environmentalconditions under which the PCB is to be placed. The followinggraph shows the general relationship between the voltagebetween conductors and the conductor pitch on a PCB. However,if the PCB must conform to safety organization standards (suchas UL, CSA, VDE, etc.), priority must be given to fulfilling theirrequirements.

3.5

Break in land

0.2 to 0.5 mm

Item Epoxy Based Phenol-based

Glass Epoxy (GE) Paper Epoxy (PE) Paper Phenol (PP)

Electrical characteristics

Mechanical characteristics

Cost Effectiveness

High insulation resistance.Insulation resistance hardlyaffected by humidity.

Little expansions/shrinkagecaused by change intemperature or humidity.Suitable for through-hole PCBsand multi-layered PCBs.

Fair Much expansion/shrinkagecaused by changes intemperature or humidity.Not suitable for through-holePCB.

Expensive Fair Fair

Fair Insulation resistance degradedby humidity.

Correct

Incorrect

Conductor Width and Carry Current(according to IEC Pub326-3)

Sectional area (mm )

Allo

wab

le c

urre

nt (

A)

Con

duct

or w

idth

(m

m)

Tem

pera

ture

ris

e va

lue

100C75C50C40C30C20C10C

0.03 0.05 0.07 0.1 0.3 0.5 0.7

610 g/m 70 mm

305 g/m35 mm

2

2

2Terminal Hole Diameter Minimum Land Diameter

Normal Tolerance

0.6 mm 0.1 mm 1.5 mm0.8 mm 1.8mm1.0 mm 2.0mm1.2 mm 2.5mm1.3 mm 2.5mm1.5 mm 3.0mm1.6 mm 3.0mm2.0 mm 3.0mm


25


Voltage between Conductors vs. Conductor Pitch

Rat

ed v

olta

ge c

ondu

ctor

s (V

DC

)

Conductor pitch (mm)

A = w/o coating at altitude of 3,000 m max.B = w/o coating at altitude of 3,000 m

or higher but lower than 15,000 mC = w/coating at altitude of 3,000 m max.D = w/coating at altitude of 3,000 m or higher

C

A

DB

Temperature and HumidityPCBs expand or contract with changes in temperature. Shouldexpansion occur with a relay mounted on the PCB, the internalcomponents of the relay may be shifted out of operationaltolerance. As a result, the relay may not be able to operate withits normal characteristics.PCB materials have directionality, which means that a PCBgenerally has expansion and contraction coefficients 1/10 to 1/2higher in the vertical direction than in the horizontal direction.Conversely, its warp in the vertical direction is 1/10 to 1/2 lessthan in the horizontal direction. Therefore, take adequate counter-measures against humidity by coating the PCB. Should heat orhumidity be entirely too high, the relays physical characteristicswill likewise be affected. For example, as the heat rises the PCBsinsulation resistance degrades. Mechanically, PCB parts willcontinue to expand as heat is applied, eventually passing theelastic limit, which will permanently warp components. Moreover, if the relay is used in an extremely humid environment,silver migration may take place.GasExposure to gases containing substances such as sulphuric acid,nitric acid, or ammonia can cause malfunctions such as faultycontacting in relays. They can also cause the copper film of a PCBto corrode, or prevent positive contacts between the PCBsconnectors. Of the gases mentioned, nitric acid is particularlydamaging as it tends to accelerate the silver migration. As acounter-measure against gas exposure damage, the followingprocesses on the relay and PCB have proved useful.

Item Process

Outer Casing, Sealed construction by using housing packing, etc

Relay Use of simplified hermetically sealedtype relay, DIP relay, reed relay

PCB, Copper Firm Coating

Connector Gold-plating, rhodium-plating process

Vibration and ShockAlthough the PCB itself is not usually a source of vibration orshock, it may simplify or prolong the vibration by resonate withexternal vibrations or shocks. Securely fix the PCB, payingattention to the following points.

Mounting PositionDepending on where the relay is mounted, the function of therelay (and the performance of the circuit which includes the relay)may be adversely affected.The relay may malfunction if it is mounted near a transformer orother device that generates a large magnetic field, or much heat.Provide an adequate distance between the relay and suchdevices.Also, keep the relay away from semiconductor devices, if they areto be mounted on the same PCB.

Mounting DirectionTo allow a relay to operate to its full capability, adequateconsideration must be given to the mounting direction of the relay.Relay characteristics that are considerably influenced bymounting direction are shock resistance, life, and contactreliability.Shock ResistanceIdeally, the relay must be mounted so that any shock or vibrationis applied to the relay at right angles to the operating direction ofthe armature of the relay. Especially when a relays coil is notenergized, the shock resistance and noise immunity aresignificantly affected by the mounting direction of the relay.LifeWhen switching a heavy load that generates arc (generally, havinga greater impedance than that of the relay coil), substancesspattered from the contact may accumulate in the vicinity,resulting in degradation of the insulation resistance of the circuit.Mounting the relay in the correct direction is also important inpreventing this kind of degradation of the insulation resistance. Contact ReliabilitySwitching both a heavy and a minute load with a single relaycontact is not recommended. The reason for this is that thesubstances scattered from the contact when the heavy load isswitched degrade the contact when switching the minute load.For example, when using a multi-pole contact relay, avoid themounting direction or terminal connections in which the minuteload switching contact is located below the heavy load switchingcontact.

Correct

Incorrect

Mounting Method Process

Rack Mounting No gap between racks guide & PCB

Screw Mounting Securely tighten screw.Place heavy components such asrelays on part of PCB near wherescrews are to be used.

Attach rubber washers to screwswhen mounting components that areaffected by shock (such as audio devices.)

PC

B R

elay

s


26


Automatic Mounting of Relay on PCBTHOUGH-HOLE MOUNTING

The following tables list the processes required for mounting a relay onto a PCB and the points to be noted in each process.Process 1: PlacementDo not bend any terminal of the relay to use it as a selfclinching relay or the relay may malfunction.It is recommended to use magazine-packaged selfclinching relays for placement onto the PCB.Possibility of Automatic Placement

Process 2: Flux ApplicationTo apply flux to a flux protection or fully sealed relay, a sponge soaked with flux can be used. Place the relay in the holes drilled in thePCB and press the PCB (with the relay still mounted) firmly against the sponge. The flux will be pushed up the relays contact legs, andthrough the PCB holes. This method must never be applied with an unsealed relay because the flux will penetrate into the relay.The flux used with the sponge must be a non-corrosive resin-type flux.For the flux solvent, use an alcoholbased solvent, which tends to be less chemically reactive.Apply the flux sparingly and evenly to prevent penetration into the relay. When dipping the relay terminals into liquid flux, be sure to adjustthe flux level, so that the upper surface of the PCB is not flooded with flux.Possibility of Dipping Method

Process 3: TransportationWhen the PCB is transported, the relay mounted on the PCB may be lifted from the board surface due to vibration. This can be preventedif the relay mounted on the PCB has self-clinching terminals.

Mounting IntervalWhen mounting multiple relays side by side on a PCB, payattention to the following points:When many relays are mounted together, they may generate anabnormally high heat due to the thermal interference between therelays. Therefore, provide an adequate distance between therelays to dissipate the heat. When using a relay, be sure to checkthe minimum mounting interval.Also, if multiple PCBs with relays are mounted to a rack, thetemperature may rise. In this case, preventive measures must betaken so that the ambient temperature falls within the rated value.PATTERN LAYOUT

Countermeasures Against NoiseThe relay can be a noise source when viewed from asemiconductor circuit. This must be taken into considerationwhen designing the layout positioning of the relay and othersemiconductor components on the PCB.Keep the relay away from semiconductor components as far awayas possible.Locate the surge suppressor for the relay coil as close to the relayas possible.Do not route wiring for signals such as audio signals that are likelyto be affected by noise below the relay.Design the shortest possible pattern.One method for separating the power source and relay from otherelectronic components is to use shielded patterns.

CoatingAs is also the case in humid environments, coating the PCB isrecommended to prevent the insulation of its pattern form beingdegraded by gases containing harmful substances. When coatingthe PCB, however, care must be exercised not to allow thecoating agent to penetrate into the relays mounted on the PCB;otherwise, faulty contact of the relay may occur due to sticking orcoating. Moreover, some coating agents may degrade oradversely affect the relay. Select the coating agent carefully.Type of Coating

Unsealed Flux protection Fully sealed

NO YES YES

Construction Unsealed Flux protection Fully sealed

Magazine-packaged relay NO YES YES

Self-clinching relays

Item Applicability Featureto PCB with

relays mounted

Epoxy Good Good insulation. Performing this coating is a little difficult, but hasno effect on relay contact.

Urethane Good Good insulation and easy tocoat. Be careful not to allowthe coating on the relay itself,as thinner-based solvents areoften used with this coating.

Silicon Good Good insulation and easy tocoat. However, silicon gas maycause faulty contact of relay.


27


Process 4: PreheatingPreheat the PCB at a temperature of 110C maximum within a period of approximately 40 seconds for smooth soldering. Thecharacteristics of the relay may change if it is heated at a high temperature for a long time.

Possibility of Preheating

Process 5: SolderingFlow soldering is recommended to assure a uniform solder joint. Solder temperature and soldering time: 260C, 5 s max. Adjust the level of the molten solder so that the PCB is not flooded with solder.

Possibility of Automatic Soldering

Process 6: CoolingUpon completion of automatic soldering, use a fan or other device to forcibly cool the PCB. This helps prevent the relay and othercomponents from deteriorating from the residual heat of soldering.Fully sealed relays are washable. Do not, however, put fully sealed relays in a cold cleaning solvent immediately after soldering or theseals may be damaged.

Complete the soldering operation quickly. Use the correct wattage of soldering iron. Do not overheat while smoothing the applied solder with the tip of the iron. Solder: JIS Z3282, H60, or H63 (containing resin-type flux) Soldering iron: rated at 30 to 60 W Tip temperature: 280C to 300C Soldering time: 3 s max. The following table contains recommended solders:

Type Sparkle solderApplicable solder diameter 0.8 to 1.6 mmSpread rate 90%Storage 3 months max.

Solder

Flux

The solder in the illustration shown above is provided with a cut section to prevent the flux from splattering.

Possibility of Manual Soldering

Unsealed Flux protection Fully sealedYES YES YES

Manual Soldering


NO YES YES

Flux protection Fully sealed

Necessary Necessary


NO YES YES

110C

Heater

PC

B R

elay

s


28


Note: 1. Consult your OMRON representative before using any other cleaning solvent. Do not use Freon-TMC-based, thinner-based, orgasoline-based cleaning solvents.

2. Worldwide efforts are being made at discontinuing the use of CFC-113-based (fluorochlorocarbon-based) and trichloroethylene-based cleaning solvents. The user is requested to refrain from using these cleaning solvents

3. It may be difficult to clean the space between the relay and PCB using hydrogen-based or alcohol-based cleaning solvent. It isrecommended the stand-off-type be used G6A- -ST when using hydrogen-based or alcohol-based cleaning solvents.

4. Ultrasonic cleaning may have an adverse effect on the performance of relays not specifically manufactured for ultrasoniccleaning. Please refer to the model number to determine if your relay is intended to be cleaned ultrasonically.

Process 8: CoatingDo not apply a coating agent to any flux-resistant relay or relay with a case because the coating agent will penetrate into the relay andthe contacts may be damaged.Some coating agents may damage the case of the relay. Be sure to use a proper coating agent.Do not fix the position of relay with resin or the characteristics of the relay will change.

Resin Fully Sealed

Epoxy YES

Urethane YES

Silicone NO

Fluorine YES

List of Cleaning Solvents

Chlorine-based Perochlene YesChlorosolderTrichloroethylene

Water-based Indusco YesHolys

Alcohol-based IPA YesEthanol

Others Thinner NoGasoline

Cleaning method Automatic cleaningUltrasonic cleaning (see note 4)

Solvent Fully Seated

Process 7: CleaningAvoid cleaning the soldered terminals whenever possible. When a resin-type flux is used, no cleaning is necessary. If cleaning cannot beavoided, exercise care in selecting an appropriate cleaning solvent.

Clensing Method


Boiling cleaning and immersion cleaning are possible. Ultrasonic cleaningwill have an adverse effect on the performance of relays not specifically

manufactured for ultrasonic cleaning.The washng temperature is 40C max..

Boiling cleaning and immersioncleaning are not possible. Clean only

the back of the PCB with a brush.


29


PC

B R

elay

s

Soldering Profile

!

PCB RELAY THT TYPE PROFILE OF SOLDER TEMPERATURE FOR LEAD FREE

Process flow chart

Solder Profile

Soldering Heat Resistance PCB (THT)

Item Present (SnPB) Lead Free Type

Preheating temperature 100C 110C

Preheating time 60 sec. max. 40 sec.

Solder temperature Approx. 250C 260C

Soldering time 5 sec. max. 4 sec. max.

We recommend to confirm under the actual soldering condition at the customer before use.


30


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#

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%

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#

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Recommended IRS Conditions (G6H-2F)

The recommended soldering conditions show the temperaturechanges of the PCB surface. The conditions however, differ withthe relay model. Check the relay specifications before soldering(for details refer to precautions for each model). Do not put therelay in a cleaning solvent or other cold liquid immediately aftersoldering or the seal of the relay may be damaged.

The recommended soldering conditions show the temperaturechange of the relay terminal section. The conditions howeverdiffer with the relay model. Check the relay specificationsbefore soldering (for details refer to precautions for each model).Do not put the relay in a cleaning solvent or other cold liquidimmediately after soldering or the seal of the relay may bedamaged.

Recommended IRS Conditions (G6H-2F)

Process 4: Soldering Reflow

SURFACE MOUNTING

The following tables list the processes required for mounting a relay onto a PCB and the points to be noted in each process.Process 1: Cream Solder PrintingDo not use a cream solder that contains a flux with a large amount of chlorine or the terminals of the relay may be corroded.Process 2: Relay MountingThe holding force of the relay holder must be the same as or more than the minimum holding force value required by the relay.

Process 3: TransportationThe relay may be dismounted by vibration during transportation. To prevent this, it is recommended an adhesive agent be applied to therelays gluing part (protruding part) to tack the relay.Adhesive Agent Application Methods

Dispenser Method Screen-printing Method

YES YES

Direction ADirection BDirection C

Direction G6H G6S

A 200 g max. 200 g max.

B 500 g max. 500 g max.

C 200 g max. 200 g max.

Mounting temperature for Lead solder mounting Mounting temperature for Lead-Free solder mounting

Note: Do not submerge the relay in a solder bath. Doing so will deform the resin causing faulty operation.

IRS Recommended Soldering Temperature


31


PC

B R

elay

s

CleaningBoiling cleaning and immersion cleaning are recommended.Ultrasonic cleaning will have an adverse effect on the performance of relays not specifically manufactured for ultrasonic cleaning.List of Cleaning Solvent

Note: 1. Consult your OMRON representative before using any other cleaning solvent. Do not use Freon-TMC-based, thinner-based, orgasoline-based cleaning solvents.

2. Worldwide efforts are being made at discontinuing the use of CFC-113-based (fluorochlorocarbon-based) and trichloroethylene-based cleaning solvents. The user is requested to refrain from using these cleaning solvents

3. It may be difficult to clean the space between the relay and PCB using hydrogen-based or alcoholbased cleaning solvent. It isrecommended the stand-off-type be used G6A- -ST when using hydrogen-based or alcohol-based cleaning solvents.

4. Ultrasonic cleaning may have an adverse effect on the performance of relays not specifically manufactured for ultrasoniccleaning. Please refer to the model number to determine if your relay is intended to be cleaned ultrasonically.

Chlorine-based Perochlene YesChlorosolderTrichloroethylene

Water-based Indusco YesHolys

Alcohol-based IPA YesEthanol

Others Thinner NoGasoline

Cleaning method Automatic cleaningUltrasonic cleaning (see note 4)

Solvent Fully Seated


32


Item Symbol Rating

Collectorbase voltage VCBO 60 V

Collectoremitter voltage VCBO 50 V

Emitterbase voltage VCBO 5.0 V

Collector current (DC) IC (DC) 100 mA

Collector current (pulse) IC (pulse)* 200 mA

Base current (DC) IB (DC) 20 mA

Base current (pulse) IB (pulse)* 40 mA

Total power dissipation PT 250 mW

Junction temperature TJ 125C

Storage temperature Tstg -55C to 125C

IPW _ 50%

Correct UseRELAYS IN ELECTRONIC CIRCUITRYDriving by TransistorWhen a transistor is used to drive the relay, be sure to ground theemitter of the transistor.

When the transistor is used in a emitter-follower configuration(i.e., the collector is grounded), give adequate consideration tothe voltage across the collector and emitter. The required voltagemust be applied to the relay.Selecting a Transistor for Driving the RelayAfter determining which relay to use, and after becoming familiarwith its ratings, select a transistor to drive the relay.1. From the relays catalog or data sheet, ascertain the following

characteristics:Rated voltage: _ VDCRated current: _ mAcoil resistance: _

2. Determine the minimum and maximum values of the mustoperate voltage form the rated voltage.Minimum must operate voltage: _ VMaximum must operate voltage: _ V(If ripple is contained in the rated voltage, obtain the maximumvalue including the ripple.)

3. By determining the component for suppressing surge, obtainthe dielectric strength of the transistor for driving the relay.

* This safety factor must be determined by the user.** The breakdown voltage differs, depending upon thecomponent. Therefore, if multiple zener diodes are to be used,use their maximum breakdown voltage.*** The varistor voltage differs depending upon the component. Inaddition, the varistor voltage of a single varistor may varydepending upon the current. Consult the manufacturer of thevaristor to be used to determine the varistor voltage.**** The surge voltage differs depending upon the type and ratingof the relay, and the constants of C and R of the circuit in whichthe relay is used. Positively determine the surge voltage byexperiment.

4. Determine collector current IC.IC = Maximum must operate voltage/coil resistance x 2*

5 *This safety factor must be determined by the user.Select the transistor that satisfies the conditions determined insteps 3 and 4 above.

Absolute Maximum Ratings (NPN Transistor Ratings)

NPN transistor

PNP transistor

< In the case of diode>(Maximum of must operate voltage + 0.6) x 2* VCEO VCBO = __V

< In the case of diode and zener diode>(Maximum of must operate voltage + 0.6 + breakdown voltage**) x 2* VCEO VCBO = __V

< In the case of varistor>(Maximum of must operate voltage + varistor voltage***) x 2* VCEO VCBO = __V

< In the case of RC>(Maximum of must operate voltage + surge voltage****) x 2* VCEO VCBO = __V

where,R Coil resistance of relay(measured changing the value of C)C = 0.01 to 0.2 F

Surge voltage

Oscilloscope

Power source to relay


33

Selection Guide Power Relays

PC

B R

elay

s

Model

Features

Appearance

Dimensions(LxWxH)

Contact Contact FormRatings

Contact Material

Resistive Load

Max. Switching Current

Min. Permissible load

Rated Voltage

Power Consumption(Approx.)

Electrical(operations)

Mechanical(operations)

Between coil & contacts

Between contacts ofdifferent polarity

Between contacts ofsame polarity

Ambient temperature (operating)

ProtectiveConstruction

Creepage (Typical)

Clearance (Typical)

Tracking Resistance (CTI)

Variations Single Side Stable

Single Winding Latching

Double Winding Latching

PCB Terminal

Plug-in Terminal

Quick Connect Terminal

Panel Mount

Fully sealed

Flux Protection

Approved Standards

Min. Pack Quantity

Min. Order Quantity

Page

G5NB-E

Compact single pole 5A high isolation relayCTI: 250

ROHS compliant

20.5 x 7.2 x 15.3

SPST-NO

AgNi

5 A at 250 VAC3 A at 30 VDC

5 A

10 mA at 5 VDC

5 to 24 VDC

200 mW

100,000 (5A / 250 VAC)50,000 (5A / 30 VDC)

5,000,000

4,000 VAC

750 VAC

-40C to 85C

Flux Protection (RTII)

7.2 mm

7.1 mm

250 V

UL, CSA, EN (VDE)

100 (Tray), 50 (Tube)

500

45

G5SB

Environmentallyfriendly compact relay

ROHS compliant

20.3 x 10.3 x 15.8

SPST

AgNi + AgSnIn


5 A

10 mA at 5 VDC

5 to 24 VDC

400 mW

50,000 min

5,000,000 min

4,000 VAC

1,000 VAC

-40C to 70C

Flux Protection (RTII)

6.7 mm

5.8 mm

250 V

UL, CSA, EN (VDE)

100 (Tray), 50 (Tube)

500

49

Coilratings

Endura-nce

Dialectricstrength

Insulationdistance

Packag-ing


34

Selection Guide Power Relays

Model

Features

Appearance

Dimensions(LxWxH)

Contact Contact FormRatings

Contact Material

Resistive Load

Max. Switching Current

Min. Permissible load

Rated Voltage

Power Consumption(Approx.)

Electrical(operations)

Mechanical(operations)

Between coil & contacts

Between contacts ofdifferent polarity

Between contacts ofsame polarity

Ambient temperature (operating)

ProtectiveConstruction

Creepage (Typical)

Clearance (Typical)

Tracking Resistance (CTI)

Variations Single Side Stable

Single Winding Latching

Double Winding Latching

PCB Terminal

Plug-in Terminal

Quick Connect Terminal

Panel Mount

Fully sealed

Flux Protection

Approved Standards

Min. Pack Quantity

Min. Order Quantity

Page

G6D

Slim miniature relay capableof relaying controller output

ROHS compliant

17.5 x 6.5 x 12.5

SPST-NO

AgSnIn


5 A

10 mA at 5 VDC

5 to 24 VDC

200 mW

70,000 min

20,000,000 min

3,000 VAC

750 VAC

-25C to 70C

Fully Sealed (RTIII)

4.5 mm

4.5 mm

100 V

UL, CSA, IEC (TV),EN (VDE)

25 (Tube)

500

55

G6DS

Slim miniature relay with 1pole 5A switching capability

ROHS compliant

20.3 x 5.08 x 12.5

SPST-NO

AgNi


5 A

5 mA at 24 VDC

5 to 24 VDC

180 mW, 120 mW(high sensitivity.)

100,000 min

20,000,000 min

3,000 VAC

750 VAC

-40C to 85C

Fully Sealed (RTIII)

6.4 mm

5.2 mm

175 V

UL, EN (VDE)

25

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