Bussmann LPJ-350SP Dual-Element Class J Fuse

The LPJ-350SP is Eaton’s Bussmann LPJ Series 350-amp, 600-volt low-peak, dual-element Class J fuse designed for time-delay protection in industrial power circuits. It is rated 350 A with a 600 VAC rating (also 300 VDC) and offers a 300 kA interrupting rating at 600 VAC and 100 kA at 300 VDC, delivering short-circuit protection while accommodating temporary overloads. This non-indicating, center-bolted fuse uses a dual-element, time-delay design to minimize nuisance openings during surges, with a typical performance described as 10 seconds at 500% rated load. The fuse features a bolt-on body with center-bolted ends and a compact footprint, measuring roughly 3.26 inches in length and 2.11 inches in diameter, making it compatible with standard LPJ holders. It carries UL Class J and CSA approvals, confirming its compliance with common electrical protection standards. The LPJ-350SP is suitable for protecting feeders and equipment where brief overloads and transient surges are expected, providing reliable current-limiting protection for medium-voltage AC circuits up to 600 VAC.