The Siemens SIRIUS 3RA6120-1EB32 is a compact starter — a direct starter design rated for continuous operation per IEC 60947-6-2. The trip class is adjustable between CLASS 10 and CLASS 20, meaning you set the overload relay to match the motor start profile — CLASS 10 for fast starts like pumps, CLASS 20 for high-inertia loads like fans or conveyors.
Wire range is 0.5 to 4 mm² solid, or two conductors up to 2.5 mm² each, which covers most motor branch wiring in a panel. The 45 mm width keeps the footprint tight on the rail; depth is 165 mm, so allow clearance for the terminals and any auxiliary block.
Environmental and electrical ratings
Shock resistance is 6 g for 10 ms, vibration resistance covers 4 to 500 Hz at 20 m/s² — typical for machine-mounted applications. The coil is 24 V DC/AC, draws about 3.5 W AC or 3.1 W DC. Two LEDs on the unit indicate status.