Telecom Protection Fuse, 7 1/2 A, 125V AC, 60V DC, GMT Series, Indicating, Fast Acting, Body Style Pin, Nonrejection, 300A at 125V AC, 450A at 60V DC, Fuse Size 13/16 in L x 25/32 in W x 1/8 in D, Length 13/16 in, Diameter Not Applicable, Width 25/32 in, Depth 1/8 in, Equivalent Brand and Series Bussmann GMT, Littelfuse 481, Mersen GMS, Equivalent Series 481, GMS, GMT, Body Material Plastic, Single Element, Color Code Black/White, Standards CE, UL Recognized, Guide JFHR2, File E56412 Fast-acting, indicating telecom fuses open within seconds of being exposed to overloads and short circuits. These fast-blow telecom fuses are highly sensitive to changes in current flow and don't tolerate temporary overload currents or power surges. Sometimes called alarm fuses, they trigger an LED or audio al.