Bussmann NSB LPN-RK-70SP Fuses

LPN-RK-70SP is a 70 A, 250 V AC Low-Peak Class RK1 fuse from Bussmann (Eaton) designed as a dual-element, time-delay fuse for circuit protection in power distribution equipment. This 250 V RK1-rated cartridge fuse is current-limiting and intended for use in applications where inrush currents occur, such as motor control centers, large distribution switchboards, and power panelboards. It carries an interrupting rating up to 300 kAIC at 600 VAC and 100 kAIC at 300 VDC, enabling protection of conductors and equipment in high-energy systems. Part of the Bussmann LPN-RK family, the 70SP variant complies with UL 248-12 for Class RK1 fuses. Typical applications include large distribution switchboards, power panelboards, motor control centers, and machinery disconnect switches, where reliable, selective protection is required. With its 70 A rating and 250 V operation, the LPN-RK-70SP is suitable for AC and DC circuits that demand time-delay protection to tolerate short surges without sacrificing safety.