FRN-R-70 is a Bussmann (Eaton) Fusetron Class RK5 time-delay fuse rated at 70 A for 250 VAC circuits and 125 VDC, part of the FRN-R family. This dual-element, current-limiting cartridge fuse delivers short-circuit protection with a 200 kA interrupting rating at 250 VAC and is non-indicating. Designed for use in electrical distribution and control circuits, it tolerates brief inrush currents typical of motors and transformers. Common equipment applications include panelboards, power supplies, and industrial controls where FRN-R RK5 fuses are specified.
