FRS-R-1 is a Bussmann Fusetron dual-element time-delay fuse rated 1 A at 600 VAC / 300 VDC, part of the Class RK5 family. It is a current-limiting, dual-element device with a time-delay design intended to tolerate brief overloads while protecting circuits from sustained faults. It is a rejection-type fuse with an interrupting rating of 200 kA RMS at 600 VAC and 20 kA at 300 VDC.
