IEC Fuse, 4 A, 500V AC, Not Rated, Class D, D16 Series, Color Code Brown, Nonindicating, Fast Acting, Body Style Cylindrical, Nonrejection, Interrupt Rating 50kA at 500V AC, Fuse Size 2 in L x 1/2 in dia, Length 2 in, Diameter 1/2 in, Equivalent Brand and Series Bussmann D16, Siemens 5SA2, Equivalent Series 5SA2, D16, Class D Fuse Size DI, IEC Operating Fuse Class gG, gL, Cap Diameter 15/64 in, Ceramic Body Material, Element Single, Standards DIN 49520, IEC 60269 Type D fuses are low-voltage, DIN-style fuses for protecting against overcurrent in power distribution systems, electrical cables, and other general industrial equipment. Also called diazed fuses, these milk-bottle-shaped fuses are typically used as replacements for Type D fuses commonly found in European-manufactured equipment. T.