Product brand name Product designation Product type designation General technical data Size of contactor Product extension ● function module for communication ● Auxiliary switch Surge voltage resistance ● of main circuit rated value ● of auxiliary circuit rated value maximum permissible voltage for safe isolation ● between coil and main contacts acc. to EN 60947-1 Protection class IP SIRIUS Power contactor 3RT2 S2 No Yes 6 kV 6 kV 400 V ● on the front ● of the terminal 3RT2037-1AL20 IP20 IP00