Fuse Block Fits Fuse Type Industrial Fuse UL Class R 401 to 600 A Number of Poles 3 600V AC/DC Compatible Fuse Series FLSR FLSR-ID IDSR KLSR LLSRK LLSRK-ID Series LFR Nonindicating Rejection 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 17.00 in Width 4.36 in Length 12.50 in Spring Reinforced Clip Yes Features Clip Designs Maximize Electrical Contact and Minimize Heat Rise