Protect your electrical circuits with these reliable 30 Amp 250V time delay fuses. This box of 10 RK5 dual element fuses serves as a compatible replacement for Cooper Bussman FRN-R-30 model. Time delay fuses are designed to handle temporary current surges without interrupting the circuit, making them ideal for applications with motor loads or other equipment that may experience momentary overloads during startup. The dual-element design combines fast-acting protection against short circuits with time-delay overload protection. These 250V rated fuses provide dependable circuit protection in various industrial and commercial applications. Each fuse is precision-engineered to meet the specifications of the original FRN-R-30 model, ensuring consistent performance and reliability. Keep your electrical systems protected with this convenient box of 10 replacement fuses.