What this SIRIUS 3RA2 starter pack delivers
The Siemens 3RA2125-0JA23-0AP6 is a non-fused motor starter from the SIRIUS family, assembled as a direct starter in size S0. It ships as a matched set: the 3RT2023-1AP60 contactor, the 3RV2011-0JA15 circuit-breaker, and the 3RA2921-1AA00 link module — all pre-bussed and ready to snap onto a DIN rail. Rated at 250 W at 400 V, it handles small pump, fan, and conveyor motors in that power band. Coil voltage is 176-242 V at 50 Hz and 192-264 V at 60 Hz. The operating frequency is 50-60 Hz.
Snap-mounted to DIN rail or screw-mounted with an additional push-in lug — the S0 frame gives you both options. Mounting position is vertical only. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards. That 0 mm backwards clearance means it can sit flush against a back panel or enclosure wall, useful when packing multiple starters in a row. Dimensions: 45 mm wide, 193.1 mm high, 97.1 mm deep — the width is the tight axis for rail density. Main contact wiring accepts 1-10 mm² stranded or 2x (2.5-6 mm²), with AWG equivalents of 2x (16-12) and 2x (14-8). Strip length and ferrule sizing follow standard S0 practice. The auxiliary switch extension is available (product extension auxiliary switch: Yes), so you can add a spare contact block for status feedback without re-wiring the power circuit.