The Siemens 3RT2037-1AP00-1AA0 is a SIRIUS power contactor in size S2, rated for 65 A at 480 V in AC-3 duty — that's the motor-switching rating, so it handles starting and running loads for motors up to that current without welding the contacts on inrush.
If your motor full-load current is under 65 A at 480 V, this contactor has headroom for starting current without derating. Mechanical life is typical at 10 million operations, and the maximum switching frequency ranges from 200 cycles/hour in AC-4 (plugging/inching) up to 800 cycles/hour in AC-1 (resistive), so it's built for continuous-duty cycling, not just on-off. The auxiliary switch is included, saving a separate add-on block for feedback or status indication in the control circuit.
Dimensions are 55 mm wide, 114 mm high, 130 mm deep — size S2 footprint. That matters for heat dissipation and arc-chamber venting. If the panel ambient exceeds 60 °C, you'll need to derate or force-ventilate.