FRS-R-30 is an Eaton Bussmann Fusetron Series Class RK5 time-delay fuse rated at 30 A, part of the FRS-R dual-element family designed for 600 V AC operation (300 V DC). It is UL-listed, non-indicating, current-limiting protection with an interrupting rating of 200 kA at 600 Vac and 20 kA at 300 Vdc, intended for use in RK5 fuse blocks within branch circuits that experience brief inrush or overload conditions. The FRS-R family employs dual-element time-delay construction to tolerate short surges while preserving fast clearance for sustained faults, making it suitable for circuits with inductive loads and other applications where inrush is expected.
