The Bussmann Fusetron FRS-R-2 Dual-Element Time Delay Fuse Class RK5 is a set of four electrical fuses designed for use in a variety of electrical equipment and supplies. These fuses are manufactured by the reputable brand Bussmann and are classified as current-limiting. Suitable for both AC and DC current types, these fuses provide reliable protection against overloads and short circuits in electrical systems. The dual-element design ensures a longer delay time before tripping, making them ideal for use in business and industrial settings where equipment downtime can be costly.