What it is and where it fits
The Siemens 3RT2517-2AF00 is a SIRIUS contactor in size S00, rated for switching motor loads in control panels. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 50022, with a 45 mm width and 73 mm depth — fits standard panel cutouts for this frame size.
Key ratings and what they mean for your BOM
Spring-type terminals on the magnet coil accept 2x (0.5... 4 mm²) solid or stranded wire — no screw torque to verify, which speeds panel wiring and reduces loose-connection callbacks. The contactor is rated for AC-1 switching at up to 1 000 operations per hour and DC switching at 10 000 operations per hour, so it handles both resistive and moderate inductive loads without derating the cycle rate. Auxiliary switch is included, saving a separate add-on block for status feedback to the PLC or safety relay. Side-by-side mounting is allowed, with 6 mm clearance at the side — no extra spacing needed between units on the rail.