KLNR Series - UL Class RK1 Fast-Acting Fuse

KLNR series RK1 fast-acting fuses were the earliest type of current-limiting fuse developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit protection. 

When used to protect inductive loads such as motors, solenoids, and transformers, KLNR series fuses must be greatly oversized to prevent opening the fuses on harmless inrush currents. In such applications, KLNR series fuses may only provide short-circuit protection.

We recommend using POWR-PRO™ LLNRK/LLSRK series RK1, dual-element, time-delay fuses in all new applications requiring the current-limiting ability of UL Class RK1 fast-acting fuses, or in existing applications where fast-acting RK1 or RK5 fuses have been opening on harmless system surges such as motor starting currents.