The Bussmann LPS-RK-400SPI is a 400 A, time-delay, dual-element current-limiting fuse from Eaton/Bussmann’s Low-Peak RK1 family, rated for 600 VAC and 300 VDC. This indicating version (SPI) provides fuse-status indication and uses a cartridge body with blade terminals compatible with RK1 holders; the body measures about 2.36 in diameter by 11.63 in long. It offers robust short-circuit protection with an interrupting rating of 300 kA at 600 VAC and 100 kA at 300 VDC, and a time-delay response of about 10 seconds. UL 248-12 listed for Class RK1 protection, and Open Fuse Indication can be included as an option.
