Siemens SIRIUS 3RT1017-1BM41 — 24 VDC Power Contactor, Size S00
Rated for 10 A in AC-12 duty (resistive loads) and 5.5 kW at 400 V in AC-3 duty (standard motor starting), it handles the common 400 V three-phase motor range up to that power.
At 45 mm wide, 57.5 mm tall, and 72 mm deep, the 3RT1017-1BM41 occupies a compact footprint on the DIN rail. Screw terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) solid or stranded conductors, with AWG equivalents of 2x (20 to 16), 2x (18 to 14), and 1x 12. This range covers most panel wiring from control circuits to motor feeders. This lets the panel designer choose between tighter protection and higher fault tolerance.
For BOM freeze or compliance documentation needs, the part carries the DIN EN 81346-2 reference code Q (power switching device). Standard Siemens documentation (datasheet, CE declaration, RoHS/REACH) applies to this active series.
The AC-3 rating of 5.5 kW at both 400 V and 690 V means this contactor directly switches three-phase induction motors up to that power at those voltages — no external contactor needed for the motor circuit. At 500 V it also carries 5.5 kW, so the power rating is consistent across the common industrial voltage range. If your application requires frequent reversals, this is the rating to check against your motor's starting current. This is the standard rating for most control panels not in clean-room or climate-controlled spaces. Above that, air density affects dielectric strength and cooling — for installations at higher elevations, consult the Siemens application manual for the derating curve.