COOPER BUSSMANN JJN-250 Fuse, 250A, Class T, JJN, 300VAC/160VDC. More details: Fuse, 250 Fuse Amps, Nonindicating, JJN Series, 300VAC/160VDC Voltage Rating, Fast Acting, Class T, Single Element, Body Material Melamine, Nonrejection, Bolt-On Body Style, Interrupt Rating 200kA at 300VAC, 20kA at 160VDC, Length 2-3/4 In., Diameter 1 In., Functionally Equal To Ferraz/Gould A3T, Littlefuse JLLN, Standards CE/UL-248-15 Guide JDDZ/CSA Class 1422-02