The Siemens 3RA6120-2AB32 is a SIRIUS compact starter — a direct-on-line motor starter that combines a contactor and overload relay in one 45 mm wide package. It's meant for continuous duty per IEC 60947-6-2, so it's sized for running a motor load, not just jogging it. The 24 V DC/AC control voltage means it drops into a standard 24 V control circuit without a separate transformer tap.
At 480 V the interrupting rating drops to 0.4 A, and at 690 V it's 3 kA, so match the rating to your available fault current. The adjustable trip class — selectable between CLASS 10 and CLASS 20 — lets you set the overload curve to the motor's thermal capacity: CLASS 10 for pumps and fans that start unloaded, CLASS 20 for high-inertia loads like centrifuges or crushers that need a longer acceleration ramp.