FLSR075 - FLSR Series Fuse | Electrical Protection Fuse The Littelfuse FLSR075 fuse is a UL Class RK5 dual-element time-delay fuse designed for reliable protection of electrical circuits, particularly those containing motors. It is widely used in industrial and commercial applications by electrical distributors and switchgear suppliers for safeguarding service entrance switches, transformers, switchboard mains and feeders, and motor control circuits. The fuse offers advanced short circuit and overload protection, ensuring current limiting capabilities for enhanced safety in lighting solutions and wire and cable systems. Specifications Manufacturer: Littelfuse Manufacturer Part Number: FLSR075 Amperage Rating: 75 A Voltage Rating AC: 600 V Voltage Rating DC: 300 V Interrupting Rating AC: 300 kA rms symmetrical Interrupting Rating DC: 20 kA Fuse Class: UL Class RK5 UL Listed (File: E81895) CSA Certified (File: LR29862) Federal Specification: WF-1814 (QPL-W-F-1814) Product Weight: 285.6 grams Features Dual-element, time-delay design for superior short circuit and overload protection Current limiting to reduce damage during fault conditions Available in indicating and non-indicating versions (this model is non-indicating) Widely used for general purpose circuits including motor branch circuits and switchboard mains Downloads & Links FLNR and FLSR Series Datasheet UL JDDZ E81895 CSA 1422-02 029862