Littelfuse FLSR-045 is a low voltage current-limiting fuse from the Powr-Gard family designed to provide reliable overcurrent protection in industrial electrical systems. It features a 45A current rating and a 600V AC voltage rating, capable of interrupting up to 200kA short-circuit currents. The fuse is constructed with a single-barrel design featuring ferrule connections and measures 1.06 inches in diameter with a weight of 5.19 lb. It carries a Class RK5 rating, indicating a high degree of current limitation and compliance with relevant industry standards for time-delay characteristics. Typical applications include the protection of motor circuits, transformers, and feeder circuits where a high interrupting rating and selective coordination are required.