Cooper Bussmann By Eaton JHC-400 Class J Fuse

The Cooper Bussmann by Eaton JHC-400 Class J fuse is a high-current protection device in the Bussmann Class J family, rated for 400 amperes at up to 600 volts. This 400 A, 600 V Class J fuse provides fast interruption of overcurrent events to protect downstream wiring and equipment in electrical distribution systems, making it suitable for installation in industrial and commercial power panels and motor control circuits that operate at voltages up to 600 VAC. Built to the Bussmann Series standards, the JHC-400 is designed to fit standard Bussmann Class J fuse clips and enclosures, enabling straightforward replacement and integration into existing protection schemes. Its Class J form factor is optimized for compact installation in space-constrained panels while delivering reliable protection in high-load applications. Use cases typically include protection of feeders, switchgear, and motor controllers in systems designed for voltages not exceeding 600 VAC, where precise current interruption is required to minimize damage from short circuits or overloads. When selecting a replacement or upgrade, verify that the JHC-400 matches the system voltage (600 VAC) and current rating (400 A) and that the enclosure and fuse clips are compatible with Bussmann Class J devices.