Fuse, 1/2 A, 250V AC, 125V DC, Class K5, NON Series, Fast Acting, Body Style Cylindrical, Nonrejection, Interrupt Rating 50kA at 125V DC, 50kA at 250V AC, Fuse Size 2 in L x 9/16 in dia, Length 2 in, Diameter 9/16 in, Equivalent Brand and Series Bussmann NON, Littelfuse NLN, Mersen OT, Equivalent Series NLN, NON, OT, Compatible Fuse Block Series 2HKRFB, H250, HM250, HM600, No, Body Material Melamine, Single Element Fast-acting, nonindicating UL Class H and K5 fuses are for general purpose use in existing installations that require a high-sensitivity, fast-blow fuse. These fuses are highly sensitive to changes in current flow and don't tolerate temporary overload currents or power surges, so they open within seconds of being exposed to overloads and short circuits. They have no indicator fo.