POWR TK-ST120-480NN-FL 120kA/phase 30 Year warranty (includes lightning) Dual Component Level Fusing (over current plus thermal) allows for direct bus connection or installation on any size breaker or non-fused disconnect. Component level fusing will pass units' full rated peak surge current without premature fuse failure that occurs with cartridge type phase fuses Onboard audible alarm, Nema 4 steel enclosure, UL 1449, UL 1283 Form C contacts for remote monitoring capability ENHANCED TRANSIENT FILTER