Bussmann FRS-R-80 Dual Element Current Limiting Fuse

The Bussmann FRS-R-80 is a Class RK5 dual-element, time-delay fuse from the FRS-R family (Fusetron) that provides current-limiting protection for low-voltage circuits, combining fast fault clearing with the ability to tolerate normal startup transients in motors and other inductive loads. Rated at 80 A with a 600 VAC / 300 VDC operating range, it delivers interrupting ratings of 200 kA at 600 VAC and 20 kA at 300 VDC, and is described as a non-indicating device designed for economical, reliable protection. As a dual-element, time-delay protection option in control panels and power paths, the FRS-R-80 guards conductors and downstream equipment against short circuits while minimizing nuisance trips during inrush events and when feeders see startup surges. Part of the Bussmann RK5 lineup, the FRS-R series is a widely used standard in 600 V class circuits across industrial applications, designed to fit standard RK5 fuse holders and assemblies for dependable overcurrent protection.