Class H and R Fuse Holder Dimensions5/16 HEX-
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Fuse Holders
General Information:Marathon has been manufacturing quality fuse holders for over 30 years. The key word isquality. It is incorporated into every Marathon fuse holder, right along with design.
The product line includes a broad range of holders to accommodate the following fuses:Class H, K, R, T, J, CC, G, CD and M (miscellaneous).The majority of these fuse holders are available in 250 and 600 volts at current ratings from30 through 600 amperes.
The Class R, T, J, CD and CC fuse holders have passed 200,000 ampere high currentinterrupt testing in accordance with UL standard UL512 for fuse holders.
Class R and CC fuse holders have a rejection feature which prevents the insertion of a fusewith lower interrupting rating. The size of Class T and J fuse holders prevent the insertion ofa fuse with lower interrupting rating.
Fuse Clips:Marathon fuse holders are equipped with the patented "Cool Clip®". This fuse clip is standard onall 30 through 200 amp fuse holders. The heat generated in a fuse clip can actually reduce thelife of the fuse, the clip and the conductor, as well as the protection power of the fusing device.No longer is it necessary for heat build up to rob equipment of protection and extended life.
Marathon's revolutionary "Cool Clip®" is the result of an extensive analytical optimization pro-cess. Heat is dissipated so well through the "Cool Clip®" the conductor acts as a heat sink andat the same time eliminates broken or sprung fuse clips.
Reinforcing members are available for most Marathon fuse holders, for use where an extra tightconnection is required. These are recommended for electric heat or where high ambients arepresent.
To comply with Automotive Industry Standard ET-2 use the following options:Class H Holder with Reinforcing Member30 Amp use SP Connector or Copper Box Connector60 Amp use Copper Box Connector
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Fuse Holders
Wire ConnectorsMarathon fuse holders are available with three types of wire connectors.
S — Screw ConnectorAn economical connector for use with a wire, or either a ring or spade type terminal. Screw is #10-32 steel.
SP — Sems Pressure ConnectorA positive pressure connector eliminating the need for a wire terminal. Ideal for use where there is avibration problem. Sems pressure screw is #10-32 steel.
B — Box ConnectorSuitable for use with stranded or solid wire. Connector is aluminum tin plated.
Copper Box Connectors are available on 30 and 60 amp fuse holders. Add CU after the catalognumber.
Wire RangesAll wire ranges shown in the fuse holder section are the ranges of the wire connector that is used asa component of the fuse holder assembly.
Ordering Code
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Applications
Marathon fuse holders can be used in various applications, including control panels, lightingand heating circuits, motor circuits, circuit breaker protection, switchgear equipment, appli-ances, electric heat, air conditioning and refrigeration equipment, elevator systems and trans-former protection.
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