BK/GBB-20 is a very fast-acting ceramic tube fuse from the GBB Series, designed for reliable overcurrent protection. This fuse features a 20A 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). It offers AC interrupting ratings of 200A at both 250Vac and 125Vac, and a DC interrupting rating of 200A at 125Vdc. The fuse features ceramic tube construction with nickel-plated brass endcaps and has a typical DC cold resistance of 0.00330O and typical voltage drop of 0.0728V. UL Recognized to standard 248-14 and CSA Component Accepted, this fuse is suitable for applications requiring fast response to overcurrent conditions.