Fuse Block Fits Fuse Type Industrial Fuse UL Class J 401 to 600 A Number of Poles 3 600V AC/DC Compatible Fuse Series JTD JTD-ID Series LFJ Nonindicating Nonrejection Fuse Block Design Open Wire Range 500 kcmil to 4 AWG Mounting Style Bolt-Down DIN Rail Body Material Thermoplastic Connector Type Box Lug Height 11.75 in Width 4.36 in Length 12.00 in Spring Reinforced Clip Yes Features Phenolic Blocks Have Side Barriers for Isolation