Cooper Bussmann LPS-RK-400SP RK1 Class Fuse Device

The LPS-RK-400SP is a 400 A, 600 V class RK1 fuse from Eaton Bussmann (formerly Cooper Bussmann) designed for high-current protection in industrial power-distribution blocks and panels. This low-peak, dual-element, time-delay, current-limiting fuse uses blade-end terminals and is non-indicating, with a compact footprint of 11.63 in length by 2.36 in by 2.36 in and an approximate weight of 4.6 lb. Electrical ratings include 600 VAC and 300 VDC, with interrupt ratings of 300 kAIC at 600 VAC and 100 kAIC at 300 VDC, enabling fast fault interruption while tolerating temporary inrush. The device adheres to UL 248-12 Class RK1 requirements and carries RoHS and CE markings; it also features electrically isolated end caps for safer installation. In applications, it is used to protect feeders and motor-control circuits in industrial equipment, offering reliable, code-compliant protection in large power distribution systems that require a rugged RK1 solution.