GBB-4 is a very fast-acting ceramic tube fuse designed for reliable overcurrent protection in electronic circuits. It features a 4A current rating with voltage ratings of 250Vac and 125Vdc, and offers AC interrupting ratings of 200A at 250Vac and 10,000A at 125Vac. The fuse has a physical size of 1/4" x 1-1/4" (6.35 x 31.75mm) with ceramic tube and nickel-plated brass endcap construction. With a typical DC cold resistance of 0.03175O and typical voltage drop of 0.1778V, it provides efficient circuit protection. This UL Recognized and CSA Component Accepted fuse is ideal for applications requiring fast response to overcurrent conditions, with optional axial leads available for PCB mounting.