Bussmann J60400-1CR Fuse Holder Block Assembly

The JM60400-1CR is a one-pole Bussmann JM modular fuse block designed to hold a Class J fuse in an open-block assembly. It is rated for 225–400 A and 600 V, with a 200 kAIC short-circuit current rating, and uses knife-blade terminations at both ends for quick insertion and removal. This open-block design belongs to Eaton’s Bussmann series JM modular fuse blocks and is intended for Class J fuses, supporting conductors from 4 AWG to 600 MCM copper or aluminum. The JM60400-1CR variant is a single-pole configuration and is designed for 600 V systems, enabling reliable protection in industrial control panels and power distribution applications, and pairs with Class J fuses to protect feeders and circuits with up to 400 A capacity. As part of the Class J block family, it mounts in standard panel installations and accepts a broad range of supply conductors, simplifying integration in protection schemes. Covers sold separately, this fuse holder block supports modular assembly in compact control panels while delivering high-current protection up to 400 A at 600 V and 200 kAIC.