Siemens 3RT1055-6SF36-3PA0 SIRIUS 3RT contactors, 3-pole, up to 250 kW. Siemens 3RT1055-6SF36-3PA0 is the exact printed commercial reference for a contactor / contactor accessory in the SIRIUS 3RT Contactors range. Siemens' official product description is: power contactor, AC-3e/AC-3 150 A, 75 kW / 400 V AC (50-60 Hz) / DC Uc: 96-127 V x (0.8-1.1) F-PLC input 24 V DC 3-pole, auxiliary contacts 2 NO + 2 NC permanently mounted drive: electronic main circuit: busbar control and auxiliary circuit: screw terminal.