BK/GBB-1-1/4 is a very fast-acting ceramic tube fuse from the GBB Series designed for reliable circuit protection. It features a 1.25A current rating with a voltage rating 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 0.179O and voltage drop of 0.2497V, it provides consistent performance. This UL Recognized and CSA Component Accepted fuse is ideal for applications requiring fast overcurrent protection in electronic equipment and instrumentation.