The Siemens 3RA1210-1EC15-0AP0 is a SIRIUS non-fused reversing starter, size S00, designed to switch and protect a three-phase motor in both directions from a single control signal. It ships as a factory-assembled unit that includes a 3RT10 15-1AP02 contactor, a 3RV10 11-1EA10 circuit-breaker for motor protection, a 3RA19 11-1AA00 link module, and a 3RA19 13-1C RS assembly kit. Because it is a reversing starter, it mechanically and electrically interlock the forward and reverse contactors, so both cannot energize simultaneously. That makes it a direct fit for any reversing motor application — conveyors, hoists, gate drives, or pump direction changes — where the panel builder wants a single order code instead of piecing together contactors, overloads, and interlocks.
This unit is designed for snapping onto 40 mm busbar systems, with a busbar center-to-center spacing of 40 mm. The mounting position is horizontal, and the fastening method is a simple snap-on — no screws needed for the busbar attachment. Dimensions are 203 mm high, 90 mm wide, and 128 mm deep, so it occupies a standard S00 footprint on the DIN rail or busbar. Clearance requirements around the unit: 20 mm upwards, 10 mm forwards, 9 mm backwards, 20 mm at the side, and 0 mm downwards.
It withstands shock up to 9.8g, which covers most vibration from contactors and nearby machinery. Wiring terminals accept solid conductors from 0.5 to 4 mm² and stranded from 0.5 to 4 mm², with a dual-wire capacity of 2x (0.75 to 2.5 mm²) for solid. AWG equivalents for main contacts are 2x (18 to 14). No PROFINET or PROFIBUS DP protocol is integrated — this is a purely electromechanical reversing starter with no digital inputs.
That said, the SIRIUS S00 platform has seen iterative updates over the years. The supplied contactor (3RT10 15-1AP02) and circuit-breaker (3RV10 11-1EA10) are current-generation components, so the assembly matches what you would order today for a new panel design. If you are holding a spare for an existing line, this exact code is the one to keep in the cabinet — no substitution needed.