Bussmann FRS-R-25 Dual-Element Time-Delay Fuse

The Bussmann FRS-R-25 is a dual-element, time-delay cartridge fuse (Fusetron) rated for 25 A at 600 V AC, designed for motor circuits and other inrush-heavy loads. As part of Eaton's Bussmann Class RK5 FRS-R series, this non-indicating fuse provides current-limiting protection with an interrupting rating of 200 kA at 600 VAC and 20 kA at 300 V DC. The 25 A rating corresponds to a body size of roughly 20.5 mm in diameter and 127 mm in length, making it compatible with standard RK5 fuse holders and replacement cartridges. This 600 VAC / 300 V DC device is built for reliable protection in industrial control panels, compressors, and other equipment that experiences brief surge currents, while preserving sensitive components during short overloads.