Siemens 3RT1044-1AC20 Power Contactor

Siemens 3RT1044-1AC20 is a Sirius power contactor designed for AC-3 motor-control duties in industrial panels. This 3-pole device uses a 24 V AC coil (50/60 Hz) and features a main circuit rated for 65 A at 400 V, delivering up to 30 kW for a typical three-phase motor; the coil voltage, frequency, and power rating reflect standard control‑panel practice. The main circuit comprises three normally open (NO) contacts and screw-terminal connections, and the unit is sized as S3 within the 3RT family. Designed for reliable switching in demanding AC‑3 duty applications, the 3RT1044-1AC20 is a common choice for motor start/stop circuits in industrial machinery and process equipment within Siemens’ Sirius lineup.