Littelfuse LLSRK100 is a low-voltage current-limiting fuse designed for circuit protection in industrial electrical systems. It features a 600V AC/DC voltage rating and 100A current rating with a 200kA interrupting capacity at 600V for high-fault protection. The fuse has a compact cylindrical design with a 3.09" diameter and clip-style connection, constructed as a single-barrel RK1 class fuse weighing 0.62 lb. It complies with UL Standard 248-12 and CSA certifications for safety and reliability. Typical applications include motor control centers, panelboards, and switchgear requiring time-delay protection against overloads and short circuits.