BK/GMD-4-R is a 5 x 20mm time-delay glass tube fuse designed for circuit protection in various electronic applications. It features a 4A rated current with a 250Vac voltage rating and nickel-plated brass endcap construction. The fuse offers an interrupting rating of 200A at 250Vac and 10,000A at 125Vac, with a typical DC cold resistance of 0.048O and typical melting I²t of 300. Designed to UL/CSA 248-14 standards, it carries UL Recognition and PSE/JET approvals. This time-delay fuse is ideal for applications requiring protection against overcurrent conditions while allowing for temporary inrush currents.