FRS-R-1-8 is a Bussmann Fusetron Class RK5 time-delay fuse rated for 600 VAC and 300 VDC with a nominal current of 0.125 A (1/8 A). Its dual-element design provides reliable overload protection and short-circuit interruption, with an RMS interrupting rating up to 200 kA. The standard non-indicating version is FRS-R-1-8, while an indicating variant is available as FRS-R-1-8ID; these cylindrical fuses are designed for RK5 fuse holders and blocks and are typically sold in cartons of 10. Within the FRS-R family, amp ratings span 1/10 A to 60 A, enabling precise protection for power supplies, control panels, and other equipment operating at up to 600 VAC while coordinating with upstream protection devices.
