Bussmann by Eaton RK5-125 Class RK5 Low Voltage Fuse

Bussmann by Eaton RK5-125 Class RK5 Low Voltage Fuse is the 125 A Fusetron model FRS-R-125, rated for 600 V and designed for time-delay, dual-element protection in low-voltage circuits. This Class RK5 fuse delivers current-limiting protection that tolerates brief inrush currents while reliably interrupting sustained overloads. It carries an interrupting rating of up to 200 kA at 600 VAC, making it suitable for protecting power distribution panels, motor drives, and other branch-circuit loads in industrial and commercial equipment. As part of Eaton’s Bussmann RK5 family, it fits RK5 fuse holders and adheres to the RK5 protection scheme, providing predictable performance within standardized dimensions and connection styles. The 125 A, 600 V rating makes it appropriate for applications where a balance between fast fault clearance and startup surge tolerance is needed, such as control circuits, drives, pumps, and lighting or power distribution circuits in facilities that require reliable protection against short circuits and overloads.