What it is and what it does
The Siemens SIRIUS 3RT2017-2BM42 is a size S00 power contactor designed for switching motor loads and resistive loads in industrial control panels. It is rated for 10 A at 24 V DC, meaning it can interrupt DC circuits at that voltage and current — a critical spec for applications like DC bus switching or solenoid control where DC arc extinction is harder than AC. The coil is 24 V DC, so verify your control voltage matches; a 24 VDC coil on a 24 VAC supply will not hold in.
Mounting and integration
Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width and 70 mm height fit standard panel layouts; depth of 73 mm means it will sit within a 100 mm deep enclosure without issue. Mounting position is flexible — rotation of +/-180° on a vertical surface, with +/-22.5° tilt forward/backward. Clearance requirements: 10 mm upwards, downwards, and forwards; 6 mm at the side. The spring-type terminals accept solid or stranded wire from 0.5 to 4 mm², or two conductors of the same range — useful for daisy-chaining control wiring without extra terminals.
Switching performance and life
Mechanical life is typical 30,000,000 operations. Switching frequency is 1,000 ops/h for AC-1.
Environmental and lifecycle
Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C — comfortable for most indoor panel environments, but verify if your panel sees direct sun or is near a furnace. Lifecycle status is current production, so this is a standard catalog item — no end-of-life risk for a new design.