Bussmann FRS-R-125 Fuse

The Bussmann FRS-R-125 is a 125 A, 600 VAC Class RK5 fuse in the Fusetron family, featuring a cartridge-body design, non-indicating construction, and a time-delay, dual-element protection scheme that tolerates brief overloads without tripping. As part of the RK5 Fusetron line, it provides current-limiting protection to help minimize fault energy while maintaining reliability in industrial power distribution where inrush and short-duration overloads are common. It is rated for 600 VAC and 300 VDC, with interrupting ratings of 200 kA at 600 VAC and 20 kA at 300 VDC, enabling fast isolation of faults in high-energy circuits. With its 125 A rating, this fuse serves as a common choice for feeders and distribution circuits in commercial and industrial environments that require robust RK5 protection and compatibility with Bussmann's Fusetron RK5 family. Designed for integration into RK5-compatible holders and standard industrial panel configurations, it provides dependable protection in protective schemes without requiring extensive panel redesign.