What this reversing starter is and how it wires up
The 3RA2220-1EB23-0AK6 is a Siemens SIRIUS non-fused reversing motor starter, size S0, designed for reversing motor loads in control panels. It snaps onto a 35 mm standard DIN rail and mounts vertically. The unit ships with a 3RT2023-1AK60 contactor and a 3RA2921-1AA00 link module, so you get the reversing pair and the mechanical interlock pre-assembled — no hunting for loose parts.
Panel fit and clearance dimensions
The starter measures 90 mm wide, 265 mm high, and 120 mm deep. That depth is the key number for enclosure depth — it needs 120 mm clear behind the DIN rail to close the door. Clearance around the unit: 30 mm above, 10 mm front, 10 mm below, 9 mm at the sides, and zero behind. The zero behind means the back of the starter sits flush against the mounting surface — no extra space needed.
Trip class and motor protection
That's standard for most general-purpose motor starting — it lets the motor accelerate past inrush without nuisance tripping, but still protects against a stalled rotor.
Voltage and power ratings across common line voltages
The reversing starter is rated for AC-3 duty up to 690 V. At 400 V it handles 1500 W (about 2 hp); at 480 V it draws 3.95 A; at 600 V it draws 4 A. The horsepower equivalents run from 0.13 hp at 110/120 V up to 3 hp at 575/600 V.