Bussmann NSB FRS-R-35 Fuse

The Bussmann FRS-R-35 is a 35 A, time-delay, dual-element fuse in the Fusetron RK5 family designed for 600 VAC circuits with a 250 VDC rating; it is a non-indicating device used to protect branch circuits and downstream equipment from overcurrent events. Built as a Class RK5 fuse, the FRS-R-35 combines fast-acting protection with a controlled, delayable response to temporary surges, helping prevent nuisance blows on inrush or motor-start currents. It carries an interrupting rating up to 200 kA at 600 VAC and 20 kA at 250 VDC, ensuring strong fault-current withstand in commercial and industrial power systems. Common applications include protection of power distribution panels, motor-control circuits, and other electrical infrastructure where reliable, time-delay overcurrent protection is required without a visual fault indicator. The FRS-R series is marketed by Bussmann/Eaton and is widely stocked by major distributors, aligning with standard RK5 fuse holders and typical bussing configurations found in industrial and commercial electrical assemblies.