Bussmann FRN-R-6-1/4RK5 Fusetron Dual Element Time Delay Fuse

The Bussmann FRN-R-6-1/4RK5 Fusetron Dual Element Time Delay Fuse is a UL Class RK5 cartridge fuse rated at 6.25 A for 250 VAC operation (125 VDC). Built with dual-element, time-delay construction, it tolerates brief inrush currents common in motors, transformers, and power supplies while providing reliable overload protection when a fault persists. This FRN-R variant offers a high interrupting rating of 200 kA at 250 VAC and 20 kA at 125 VDC, enabling safe rapid fault clearance in branch circuits found in commercial and industrial equipment. Being a non-indicating fuse, it integrates into standard RK5 fuse holders in electrical panels and equipment enclosures without additional monitoring hardware. It’s well suited for protecting control circuits, relay coils, small power conversion stages, and other electronics where short-duration surges occur but sustained overloads must be interrupted promptly. The FRN-R family is designed to deliver energy-efficient, dependable protection for equipment subject to startup transients, ensuring circuits remain safeguarded without unnecessary nuisance tripping.