The Siemens 3RA6120-2EB33 is a SIRIUS compact starter — a direct starter design that integrates a contactor and overload relay into a single 45 mm wide unit, rated for continuous operation per IEC 60947-6-2. The 24 V AC/DC coil (24 V at 50/60 Hz, 24 V DC) means it runs off a common control supply without needing separate AC or DC coils.
Rated at 15 kW at 400 V and 32 A at 480 V, this starter handles typical three-phase induction motors up to those power levels. The adjustable trip class (CLASS 10 and 20) lets you match the overload curve to the motor start profile — CLASS 10 for fast-start loads like pumps, CLASS 20 for high-inertia loads like fans or conveyors.
Mounts vertically on a horizontal standard DIN rail, secured by screw and snap-on fastening. The 45 mm width and 191 mm height fit standard panel layouts; depth is 165 mm. Vibration resistance is specified per 10 cycles at 4–5.8 Hz (15 mm amplitude) and 5.8–500 Hz (20 m/s²); shock resistance is 60 m/s² (6g) for 10 ms, three shocks per axis. Any mounting position is allowed.