Bussmann FRN-R-125 Fuse

FRN-R-125 is a Bussmann Fusetron Class RK5 fuse rated for 125 A, with voltage ratings of 250 VAC and 125 VDC. This dual-element, time-delay device is non-indicating and current-limiting, designed to interrupt high fault currents with an interrupting rating of 200 kA at 250 VAC and 20 kA at 125 VDC. As part of the FRN-R RK5 family, it suits branch-circuit protection in electrical distribution panels and equipment that require reliable short-circuit clearance without nuisance trips during brief surges. The FRN-R-125 operates at 125 A continuous and is intended for use in systems that may present motor, transformer, or power-supply fault currents up to the stated ratings. Manufactured by Eaton Bussmann Electrical Division, this model is commonly specified when a high-rupturing, current-limiting, time-delay fuse is required in 250 VAC/125 VDC circuits, and it is compatible with standard RK5 fuse holders and Bussmann accessories.