Littelfuse FLSR-250ID is a low-voltage current-limiting fuse from the Powr-Gard family, designed for circuit protection in industrial power distribution systems. It features a 600V AC rating with a 250A current capacity and 200kA interrupting rating at 600V, housed in a compact 2.59" diameter RK5-class rejection blade package weighing 3 lb. The single-barrel construction meets UL/CSA standards for time-delay protection against overloads and short circuits. Typical applications include motor control centers, panelboards, and service entrance equipment requiring high interrupting capacity.