Cooper Industries Bussmann LPJ-300SPI Low Peak Fuse

The LPJ-300SPI is a 300 A, dual-element time-delay Low-Peak Class J fuse with permanent indicating, designed for industrial protection in power-distribution equipment and rated for 600 VAC and 300 VDC. It offers a 300 kAIC interrupt rating at 600 VAC and 100 kAIC at 300 VDC, making it suitable for branch circuits, panelboards, industrial controls, and machinery disconnects. The LPJ-300SPI belongs to the Bussmann Low-Peak LPJ family, and the indicating version provides visible status during operation. The fuse body measures about 2.11 inches in diameter by 7.13 inches long and uses bolted blade-end connections for mounting. It carries CSA and RU listings with RoHS compliance. The LPJ series is characterized by a long time-delay to minimize needless fuse openings, while maintaining current limiting protection. Typical applications include branch-circuit mains, industrial control circuits, machinery disconnects, and power distribution panelboards.