Bussmann FRS-R-400 Fusetron Dual Element Time Delay Fuse

FRS-R-400 Fusetron dual-element time-delay fuse from Bussmann (Eaton) delivers 400 A of current-limiting protection in a rugged RK5 cartridge designed for 600 VAC or 300 VDC service. This non-indicating, dual‑element fuse carries an interrupting rating of 200 kA at 600 VAC and 20 kA at 300 VDC, making it suitable for circuits with brief overloads and motor-start surges in low‑voltage power distribution. The fuse features a fiberglass cartridge body, knife‑blade terminals, and holder‑mount compatibility, with a 2.34 in diameter by 11.63 in length form factor typical of RK5 fuses. As part of the Bussmann/Fusetron family, the FRS-R is configured for 400 A circuits and adheres to Class RK5 protection standards for reliable, time-delay protection in industrial and commercial electrical systems.