The Eaton Bussmann FRN-R-300 UL Class RK5 Time-Delay fuse is a protective device from the FRN-R Series designed for time-delay overcurrent protection. As a UL Class RK5 fuse, it provides reliable interruption for sustained overloads while tolerating brief surges, making it suitable for circuits that see inrush currents. The FRN-R-300 designation identifies the specific rating within the FRN-R Series, aligning this device with UL‑classified protection standards and the RK5 timing class. This time-delay fuse is intended for use in panels and equipment where momentary current spikes are expected and controlled, delivering dependable protection without unnecessary trips.
