The 3RA2120-0JD23-0AP6 is a SIRIUS non-fused motor starter in size S0, combining a contactor and a thermal bimetallic overload relay with a magnetic short-circuit trip in one unit — it's a direct starter for motor loads up to 250 W at 400 V, 370 W at 500 V, and 550 W at 690 V. Rated coil voltage is 176–242 V at 50 Hz and 192–264 V at 60 Hz, so it runs on a standard 230 V control transformer; the operating frequency is 50/60 Hz, covering both mains standards. The unit snaps onto 60 mm busbar systems and mounts vertically — the 45 mm width and 155 mm depth fit standard S0 feeder slots in a panel, with 30 mm clearance upward and 10 mm forward for wiring access.
Supplied components — what's in the box
This order code ships as a pre-assembled unit that includes the contactor (3RT2023-1AP60), the link module (3RA2921-1AA00), the circuit breaker (3RV2011-0JA10), and the busbar adapter (8US1251-5NT10) — no separate ordering of subcomponents for a standard motor feeder. The circuit breaker is size S00, while the load feeder is size S0 — the breaker provides the short-circuit and overload protection, and the contactor handles the switching duty. An auxiliary switch extension is supported (product extension auxiliary switch: Yes), so you can add feedback to a PLC or status indication without replacing the starter.
Environmental limits and mounting clearances
Mounting position is vertical only; clearance requirements are 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the side, and 0 mm backward — plan the DIN rail or busbar layout accordingly to maintain airflow and wiring access. Degree of pollution 3 means the unit is rated for conductive pollution environments typical of industrial control panels — no additional conformal coating needed for most factory-floor installations. Surge voltage resistance is 6 kV, matching IEC 60947-1 overvoltage category III for 400 V systems.