Siemens 3RT2336-1AK60 SIRIUS 3RT.3 contactors, 4-pole, up to 525 A. Siemens 3RT2336-1AK60 is the exact printed commercial reference for a contactor / contactor accessory in the SIRIUS 3RT Contactors range. Siemens' official product description is: contactor AC-1, 60 A, 400 V / 40 °C, 4-pole, 110 V AC, 50 Hz / 120 V, 60 Hz, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S2.