BK/GBB-1-1/4-R is a very fast-acting ceramic tube fuse from the GBB Series designed for overcurrent protection in electronic circuits. It features a 1.25A current rating with voltage ratings of 250Vac and 125Vdc, and a physical size of 1/4" x 1-1/4" (6.35 x 31.75mm). The fuse offers AC interrupting ratings of 200A at 250Vac and 10,000A at 125Vac, along with a DC interrupting rating of 10,000A at 125Vdc. Constructed with a ceramic tube body and nickel-plated brass endcaps, it provides reliable performance and is UL Recognized to standard 248-14 and CSA Component Accepted. This fuse is ideal for applications requiring fast response to overcurrent conditions in electronic equipment and instrumentation.