The Bussmann FRS-R-30 Fusetron is a dual-element, time-delay cartridge fuse rated at 30 A for 600 VAC and 300 VDC circuits, part of Eaton’s Bussmann RK5 Class Fusetron family. It delivers current-limiting protection with an interrupting rating up to 200 kA at 600 VAC and 20 kA at 300 VDC, and is described as part of the energy-efficient Fusetron lineup. The dual-element design tolerates brief inrush currents while protecting the circuit from sustained overloads. Designed for use in standard RK5 fuseholders, this 30 A fuse is commonly used in branch-circuit protections where reliable, time-delay protection at 600 VAC / 300 VDC is required.
