Reversing starter on 60 mm busbar — what the ratings mean
The 3RA2220-1GD24-0AP0 is a SIRIUS reversing starter — two contactors and a mechanical interlock in one S0-sized housing, pre-assembled with the supplied 3RT2024-1AP00 contactor and 3RA2921-1AA00 link module. That means forward/reverse motor control without field-wiring the interlock or matching contactor ratings yourself. Rated 6.3 A at 480 V in AC-3 duty (switching squirrel-cage motors), it covers up to 5 hp at 460/480 V and 2 hp at 220/230 V. Mounting is direct onto 60 mm busbar systems via the snap-on fastening — no DIN rail adapter needed. The vertical mounting position and the 90 mm width keep the panel layout tight; the 155 mm depth means you need that clearance behind the busbar for the contactor body and wiring.
Clearance and wiring — what fits where
The 260 mm height and 90 mm width fit the S0 feeder footprint common in Siemens motor control centers. Clearance requirements: 50 mm upward, 32 mm forward, 10 mm downward, 10 mm at the side, and 0 mm backward — so the back of the unit can sit flush against the panel backplate. Main circuit terminals are screw-type, sized for the 6.3 A continuous rating. The supplied link module handles the mechanical interlock between forward and reverse contactors — no external wiring for that function. Operating temperature range is -20 to +60 °C with temperature compensation active across that band. Storage and transport range extends from -50 to +80 °C.
Active production — sourcing posture
The 3RA2220-1GD24-0AP0 ships as a complete reversing starter assembly. No separate contactor, overload relay, or interlock module to source — one order code covers the function.