The main switch is for 380V,there are 3 type,1601 is 1P,1602 is 2P,1603 is 3P,suit for 0-40C temperature. CHARACTERISTICS GENERALC CHARACTERISTICSVOLT380V FREQUENVY60 HzAMP RANGE3.75÷30AI.C.at380V2KA NUMBER OF PHASES16011P1601N-1601NI-1611N-1611NI1P+N16022P1602N2P+N16033P1603N3P+NTEMPERATURE0-40°CTERMINAL SIZE6MM²