Fuse Block Fits Fuse Type Industrial Fuse UL Class H K5 401 to 600 A Number of Poles 3 250V AC For Fuse Size 10 3/8 in L x 2 19/32 in dia Compatible Fuse Series NLN NON OT REN RF RLN Series HM Nonindicating Nonrejection Fuse Block Design Open Wire Range 4 AWG to 500 MCM Mounting Style Bolt-Down Body Material Thermoplastic Connector Type Box Lug Height 5.3 in Width 14.8 in Length 11.41 in Spring Reinforced Clip Yes Standards CSA Certified UL Listed