Reversing starter for motor control panels
The 3RA2220-1GB24-0AK6 is a SIRIUS reversing starter, size S0, combining two contactors and a thermal overload relay in a single unit for forward/reverse motor control. It mounts on a 35 mm DIN rail or screws directly to a panel backplate, with vertical orientation specified for proper heat dissipation. The supplied contactor is a 3RT2024-1AK60, and the link module is 3RA2921-1AA00, so replacement parts are known quantities.
Duty ratings and trip class
Coil voltage range is 88–121 V at 50 Hz and 96–132 V at 60 Hz, so it works on 110 V control transformers common in North American and European panels.
Panel integration and clearances
Dimensions are 120 mm deep, 90 mm wide, 265 mm tall — the S0 footprint fits standard 200 mm deep enclosures with room for gland plates. Required clearances: 50 mm above, 32 mm in front, 10 mm below, and 10 mm at the sides — plan the backplate layout so the starter isn't boxed in against cable ducts or other devices.