FRN-R-350 from Bussmann (Fusetron series) is a dual-element, time-delay, current-limiting cartridge fuse in Class RK5, rated 350 A for 250 VAC circuits and compatible with up to 250 VDC. It is non-indicating, meaning it has no built-in visual fuse status indicator. With an interrupting rating of 200 kA at 250 VAC and 20 kA at 250 VDC, this fuse is designed to protect feeders and motors in industrial panels where brief surges can occur, making it well suited for power distribution, motor loads, and other control circuits where reliable overload protection and surge tolerance are required.
