BK/ABC-1-R is a 1/4" x 1 1/4" (6.4 x 31.7mm) fast-acting ceramic tube fuse designed for overcurrent protection in electrical circuits. It features a 1A current rating with voltage ratings of 250Vac and 125Vdc, and offers interrupting ratings of 35A at 250V, 10,000A at 125V, and 10,000A at 75V. The fuse has a typical DC cold resistance of 0.1950O, typical pre-arc I²t of 0.4310 A²s, and typical voltage drop of 0.3V. Constructed with a ceramic tube body and nickel-plated brass endcaps, it is UL Listed and CSA Certified. This fuse is ideal for applications requiring reliable fast-acting overcurrent protection in electronic equipment and instrumentation.