FLSR.300 - FLSR Series Fuse - Electrical Protection Solutions The Littelfuse FLSR.300 fuse is a UL Class RK5 dual-element, time-delay fuse designed for advanced short circuit and overload protection. It is widely used by electrical distributors and switchgear suppliers for protecting circuits, especially those containing motors. This fuse is suitable for general purpose applications including service entrance switches, transformers, switchboard mains and feeders, and motor control circuits. Specifications Manufacturer: Littelfuse Manufacturer Part #: FLSR.300 Amperage Rating: 0.3 A Voltage Rating AC: 600 V Voltage Rating DC: 300 V Interrupting Rating AC: 300 kA rms symmetrical (Littelfuse self-certified) Interrupting Rating DC: 20 kA Approvals: UL Listed (File: E81895), CSA Certified (File: LR29862), Federal Specification WF-1814 (QPL-W-F-1814) Product Weight: 1543 grams Features Dual-element design for superior short circuit and overload protection Time-delay characteristic ideal for motor and general purpose circuits Current limiting to reduce damage during fault conditions Available in indicating and non-indicating versions (this specific part is non-indicating) Downloads & Links FLNR and FLSR Series Datasheet UL JDDZ E81895 CSA 1422-02 029862