Fuse Block Fits Fuse Type Industrial Fuse UL Class J 401 to 600 A Number of Poles 3 600V AC/300V DC For Fuse Size 8 in L x 2 1/2 in dia 8 in L x 2 19/32 in dia Compatible Fuse Series A4J AJT DFJ HSJ JKS JLS JTD JTD-ID LDFJ LPJ LPJ-I Series JM Nonindicating Nonrejection Fuse Block Design Open Wire Range 4 AWG to 500 MCM Mounting Style Bolt-Down DIN Rail Body Material Thermoplastic Connector Type Box Lug Height 6 in Width 14.3 in Length 9.3 in