Bussmann FRS-R-20 Fusetron Fuse High Current Rating

The Bussmann FRS-R-20 Fusetron is a 20 A, 600 VAC/300 VDC dual‑element, time‑delay fuse in Eaton’s Bussmann FRS-R RK5 family, designed to protect electrical circuits and industrial equipment against both short circuits and overloads. It is current‑limiting with an interrupting rating of up to 200 kA at 600 VAC and 20 kA at 300 VDC, and is available as a standard non‑indicating device (an ID variant, FRS-R-20ID, provides visible indication). Part of the FRS‑R series, this fuse offers robust protection for panels, motor starters, and other control gear where startup surges must be tolerated while still delivering fast fault interruption. The 20 A rating, 600 VAC/300 VDC capabilities, and RK5 time‑delay characteristics make it suitable for electrical distribution and industrial applications requiring reliable coordination with other protective devices.