Siemens SIRIUS 3RT1044-3AP60 — Size S3 Power Contactor
The 3RT1044-3AP60 is a Siemens SIRIUS power contactor in the Size S3 frame, rated to switch motor loads up to 37 kW at 500 V and 18.6 kW at 690 V. It accepts a 220 V at 50 Hz or 240 V at 60 Hz coil supply. Screw-type terminals on the main circuit handle solid conductors 2x (0.25... 2.5 mm²) and stranded up to 2x (10... 50 mm²).
Mounts via screw fixing or snaps onto standard 35 mm and 75 mm DIN rails. Dimensions are 146 mm height, 70 mm width, and 139 mm depth — fits standard enclosure cutouts for a Size S3 device.
Switching Performance and Duty Ratings
Maximum switching frequency varies by duty: 1 000 cycles/h under AC-1 (resistive) and AC-3 (motor starting), 400 cycles/h under AC-2 (slip-ring motor), and 300 cycles/h under AC-4 (plugging/inching). Arcing time spans 10... 19 ms at AC, with a tighter 10... 15 ms window noted. Mechanical life is typically 10 000 000 operations.
Environmental and Protection
Rated for pollution degree 3 (industrial environments with conductive or dry non-conductive pollution). IP20 on the front with cover or box terminal; the terminal itself is IP00 (no finger-safe protection at the wiring point). Operating temperature range is -25... +60 °C; storage extends from -55... +80 °C.