Bussmann FRN-R-5 RK5 Class Fuse 5 Amps 250 Volts

FRN-R-5 is a Bussmann Fusetron Class RK5 dual-element time-delay fuse rated for 5 A at 250 VAC and 125 VDC, designed to protect circuits that tolerate brief overloads without nuisance trips. This non-indicating, cylindrical fuse uses a fiberglass body with ferrule terminals and is compatible with RK5 rejection-type holders, offering a robust form factor for panel mounting and equipment protection. Its dimensions are 0.56 in (14.3 mm) in diameter and 2 in (50.8 mm) long, making it a compact choice for compact control enclosures and motor-related protections. The FRN-R-5 delivers a high interrupt rating of 200 kA at 250 VAC and 20 kA at 125 VDC, providing strong fault current interruption when needed and supporting reliable protection for motors, transformers, power supplies, and other industrial controls. As part of the FRN-R family, this fuse provides dual-element protection that combines time-delay behavior with current limiting to handle startup surges and short-term overloads while maintaining circuit safety.