What it is and where it fits
The Siemens 3RT2017-2UB41 is a SIRIUS coupling contactor in Size S00, designed to switch loads in control panels where a compact, reliable interface between the control circuit and the power circuit is needed. It mounts on a 35 mm DIN rail per DIN EN 60715 via screw or snap-on fastening, and its spring-type terminals accept solid or stranded wire from 0.5 to 4 mm² (2x per clamp). The 24 VDC coil pulls in at 80% of rated voltage and holds across the full operating range of -25 to +60 °C.
Key ratings and what they mean for the buyer
The main contact is rated 10 A at 24 VDC — that's the continuous current it can carry in DC control circuits. For AC motor loads, the contactor is rated 3 A at 400 V (AC-3 duty), with a maximum switching frequency of 750 operations per hour under AC-3. The auxiliary switch is built in, so no separate add-on block is needed for feedback or status signals. Arcing time runs 10 to 15 ms, and the mechanical life is typically 30 million operations — meaning this contactor will outlast most panels it's installed in.
Mounting and spacing
The contactor measures 45 mm wide, 70 mm tall, and 73 mm deep. For heat dissipation and access, allow 10 mm clearance above and below, 10 mm forward, and 6 mm to the side. The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so it fits into tight or odd-angle enclosures.