Bussmann LPJ-600SP Time Delay Fuse Class J 600V

The Bussmann LPJ-600SP is a UL Class J, low-peak, time-delay fuse designed for heavy-load circuits, rated at 600 A and 600 V and built as a dual-element, current-limiting device. This non-indicating fuse uses bolted blade-end terminations and measures about 8 in long with a 2.5 in square footprint, weighing roughly 1.39 lb, making it suitable for panel or busbar installations in industrial power systems. It carries an interrupting rating of 300 kAIC at 600 VAC and 100 kAIC at 300 VDC, with a voltage rating of 600 VAC and 300 VDC, and provides a time-delay response that tolerates short overloads (typical 10 seconds at 500%). As part of the LPJ Class J family, the LPJ-600SP offers dual-element protection that helps maintain system reliability in applications requiring substantial surge handling while delivering dependable fault interruption under sustained overloads. Installation should use bolted-end hardware appropriate for 600 VAC equipment and follow standard industry guidelines for torque and clearance; ensure the application is within the device’s 600 VAC/300 VDC rating to prevent overvoltage conditions.