Reversing starter in a single S0 footprint
The 3RA2220-0GB23-0BB4 is a SIRIUS non-fused reversing motor starter — two contactors and a thermal overload relay integrated into one S0-size package that snaps onto a 35 mm standard rail.
Panel fit and wiring clearances
At 130 mm deep, 90 mm wide, and 265 mm tall, the S0 form factor leaves 30 mm upwards clearance, 10 mm forwards, 10 mm downwards, and 9 mm at the side for air circulation and wiring access. AWG equivalents are 2× (16 to 12) or 2× (14 to 8). The magnetic short-circuit trip handles fault clearing without relying on upstream fuses for the starter's own protection. Mounting position is vertical only — the bimetallic strip's response curve assumes gravity-assisted convection across the heater element.
Supplied as a coordinated assembly
This order code ships as a pre-coordinated set: the 3RT2023-1BB40 contactor, the 3RA2921-1BA00 link module, the 3RV2011-0GA10 circuit breaker (size S00), the 3RA2922-1AA00 busbar adapter, and the 3RA2923-1BB1 RH assembly kit — all factory-matched for the reversing configuration. The auxiliary switch extension is available (product extension auxiliary switch: Yes), and the 24 V DC coil draws 5.9 W holding power — relevant for control transformer sizing when multiple starters share a common supply.
Active production — sourcing posture
The pre-coordinated assembly means no separate procurement of contactor, overload, and breaker — one order code covers the reversing pair.