The Siemens 3RA1215-1EA15-1AP6 is a reversing combination starter in the SIRIUS S00 frame, rated for 2.8-4 A with a 600 VAC control voltage. It integrates a reversing contactor pair, a motor-protective circuit breaker, and auxiliary contacts — one SPDT NO/NC on the MSP and one NO on the contactor — into a single DIN-rail or panel-mount package. That means one device handles both forward/reverse motor switching and overload protection, saving panel space and wiring time compared to building the same function from separate components.
Where it lands in a panel
The 600 VAC control voltage means the coil circuit runs off the same line voltage as many North American motor circuits — no separate control transformer needed if the line is 480 V or 600 V. The auxiliary contacts (one SPDT on the MSP, one NO on the contactor) give you feedback for the PLC or status lamp without adding a separate aux block.