Protect your electrical circuits with this box of 10 compatible replacement time delay fuses. These 10-amp, 250-volt RK5 dual element fuses are designed as replacements for Cooper Bussman FRN-R-10 models. The dual-element design provides excellent protection against both short circuits and overload conditions, making them ideal for motor circuits and other applications requiring time-delay characteristics. These fuses offer reliable circuit protection while helping to reduce nuisance tripping. Each fuse is precision-engineered to meet the specifications of the original FRN-R-10, ensuring consistent performance and proper fit. Perfect for industrial, commercial, and residential applications where reliable overcurrent protection is essential. The convenient box of 10 fuses helps you maintain a ready supply for maintenance and replacement needs.