What it is and where it fits
The Siemens 3RT2017-1AR61 is a SIRIUS power contactor in Size S00, the smallest frame in the series, at 45 mm wide and 73 mm deep. It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, which is the standard rail profile across European and most global control panels. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, so it fits into tight or oddly oriented enclosures without forcing a panel redesign. The contactor is rated for continuous operation from -25 to +60 °C ambient, with storage tolerance from -55 to +80 °C. That covers most indoor industrial environments and unheated warehouses, but if the panel sits near a furnace or in a desert plant, the +60 °C ceiling is the hard limit — no derating curve is published in this listing, so keep the ambient below that.
Wiring and termination
The main contact coil terminates at screw-type terminals. Solid or stranded wire from 0.5 to 4 mm² is accepted, with dual-wire capability: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². That covers standard control wiring in most panels — 1.5 mm² for signal circuits, 2.5 mm² for power feeds, and 4 mm² for heavier loads. The auxiliary switch is present on this variant, so you get a built-in feedback contact without adding a separate block. Clearance distances: 10 mm upwards and forwards, 10 mm downwards, 6 mm at the side. That is tight enough for dense DIN-rail packing in a S00 frame, but verify against your specific enclosure layout — especially if you are stacking multiple contactors side-by-side with no air gap.
Switching ratings and duty cycles
Rated operational current at AC-1 (resistive load) is not explicitly listed in this record, but the contactor carries switching frequencies up to 1,000 operations per hour at AC-1 maximum, 750 ops/h at AC-2 and AC-3, and 250 ops/h at AC-4. For motor starting duty (AC-3), the 750 ops/h rate is typical for a Size S00 contactor driving small-to-medium induction motors — think pumps, fans, or conveyors up to about 5.5 kW at 400 V, though the exact motor rating is not stated in this entry. Arcing time is 10 to 15 ms at AC, which is normal for this class. The coil pick-up and drop-out times are 4 to 15 ms at AC. These numbers matter when coordinating with upstream protection — the contactor clears faster than a typical motor circuit breaker, so selectivity depends on the breaker's trip curve, not the contactor's arc.