Marathon has been manufacturing quality fuse holders for over 30 years. The key word is quality. It is molded 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 and M (miscellaneous). The majority of these fuse holders are available in 250 and 600 volts at current ratings from 30 through 600 amperes.

The Class R, T, J and CC fuse holders have passed 200,000 ampere high current testing in accordance with UL standard 512 for fuse holders.

Class R and CC fuse holders have a rejection feature which prevents the mounting of a fuse with lower interrupting capacity. The size of Class T and J fuse holders prevent the mounting of a fuse with lower interrupting capacity.

Fuse Clips

Marathon fuse holders are equipped with the patented “Cool Clip®”. This fuse clip is standard on all 30 through 200 amp fuse holders. The heat generated in a fuse clip can actually reduce the life 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 process. Heat is dissipated so well through the “Cool Clip®” the conductor acts as a heat sink and at the same time eliminates broken or sprung fuse clips.

Reinforcing members are available for most Marathon fuse holders, for use where an extra tight connection is required. These are recommended for electric heat or where high ambients are present.

To comply with Automotive Industry Standard ET-2 use the following options:
        Class H Holder with Reinforcing Member
        30 Amp use SP Connector or Copper Box Connector
        60 Amp use Copper Box Connector

Wire Connectors
Marathon fuse holders are available with three types of wire connectors.

S — Screw Connector
An economical connector for use with a wire, or either a ring or spade type terminal. Screw is a 10-32 steel.

SP — Sems Pressure Connector
A positive pressure connector eliminating the need of a wire terminal. Ideal for use where there is a vibration problem. Sems pressure screw is 10-32 steel.

B — Box Connector
Suitable for use with stranded or solid wire. Connector is aluminum with tin plate.

Copper Box Connectors are available on 30 and 60 amp fuse holders. Add CU after the catalog number.

Wire Ranges
All wire ranges shown in the fuse holder section are the ranges of the wire connector that isused as a component of the fuse holder assembly.

Ordering Code
Reinforcing                         Amp                         Connector
Member                             Rating                        Style
     |                                         |                                    | 
    R                   F               30A           3                  B                     CU        
                           |                                    |                                             |
             Designates Class H           # of Poles                           Copper Box
             Fuse holder                                                               Connector
             F=250 Volt Rating                                                    (Optional)
            6F=600 Volt Rating

Applications
Marathon fuse holders can be used in various applications, including control panels, lighting and heating circuits, motor circuits, circuit breaker protection, switchgear equipment, appliances, electric heat, air conditioning and refrigeration equipment, elevator systems and transformer protection.