The Siemens 3RA1215-0KA15-1AV6 is a SIRIUS frame size S00 reversing combination starter rated for 0.9-1.25 A, with a 12 VDC control voltage. It integrates a reversing contactor, overload relay, and short-circuit protection into one DIN-rail or panel-mount unit, saving panel space compared to building the reversing circuit from discrete components.
The 0.9-1.25 A setting range on the overload relay covers small reversing-motor or actuator loads. Frame size S00 means the physical footprint is compact — roughly 45 mm wide — so it fits in crowded control panels where every DIN-rail millimeter counts. The reversing configuration handles forward/reverse control of a single motor without external contactor interlocks. 12 VDC control voltage is a specific, low-voltage DC coil. This is not a 24 VDC part; verify your control transformer or PLC output matches 12 VDC nominal before wiring. The built-in auxiliary contacts — one SPDT NO/NC and one NO — provide feedback signals for the PLC or status indication without adding external blocks.