FRS-R-400 is a 400 A, 600 VAC (300 VDC) dual-element time-delay fuse from Bussmann's Fusetron line, Class RK5, designed for branch-circuit protection in industrial and commercial electrical systems. This non-indicating, current-limiting fuse tolerates brief overloads and has an interrupting rating of 200 kA at 600 VAC and 20 kA at 300 VDC. The rugged fiberglass cartridge body uses knife-blade terminals suitable for holder-mount installations and measures 2.34 in diameter by 11.63 in length. It is UL Listed, with CSA and CE listings commonly referenced on distributor pages.
