Reversing starter identity and motor protection
The Siemens 3RA2220-1BB23-0BB4 is a non-fused reversing motor starter from the SIRIUS family, size S0, designed to start, stop, and reverse three-phase motors in a single compact package.
Global voltage and power coverage
Rated for AC-3 duty up to 690 V, this reversing starter covers 0.75 kW at 400 V, 1.1 kW at 690 V, and 1 hp at 575/600 V — spanning 50/60 Hz networks across IEC and NEMA territories. The 24 V control coil keeps the control circuit at safe extra-low voltage, common in PLC-controlled panels where 24 VDC is the standard logic rail.
DIN rail mounting and panel footprint
Snap-on fastening on 35 mm standard rail, vertical mounting position only — the 90 mm width and 130 mm depth fit a size S0 feeder slot, with 30 mm upward clearance and 10 mm forward clearance for wiring and heat dissipation. The supplied link module (3RA2921-1BA00) and busbar adapter (3RA2922-1AA00) are pre-configured for this reversing configuration, reducing panel wiring time.
Supplied contactor and wiring range
Includes the 3RT2023-1BB40 contactor as the switching element, rated for electromechanical AC-3 duty. Main contact wiring accepts 1–10 mm² stranded or 2×(2.5–6 mm²), with AWG equivalents of 2×(16–12) or 2×(14–8).