SIRIUS 3RT2017-1BF41 — compact power contactor for motor and resistive loads
The Siemens 3RT2017-1BF41 is a Size S00 power contactor from the SIRIUS family, built for switching motor and resistive loads in control panels. Its 110 VAC coil drives main contacts rated for AC-3 duty at 750 switching cycles per hour, with a mechanical life of 30 million operations typical. The auxiliary switch integrated into the contactor handles up to 10 A at 24 V or 1 A at 110 V, covering feedback and interlock wiring without an add-on block. Mounting is via screw fixing or snap-on onto 35 mm DIN rail per DIN EN 60715, with the contactor accepting solid or stranded conductors from 0.5 to 4 mm² at the screw terminals. The compact 45 mm width and 73 mm depth leave room for adjacent devices in a crowded enclosure.
Duty-cycle ratings and what they mean for your application
The 3RT2017-1BF41 carries separate maximum switching frequencies per duty class: 1,000 cycles/h for AC-1 (resistive loads), 750 cycles/h for AC-3 (squirrel-cage motors, starting and disconnecting running), 750 cycles/h for AC-3e (enhanced AC-3), and 250 cycles/h for AC-4 (plugging, inching, reversing). AC-3 is the common motor-switching rating; if your application involves frequent reversing or inching, the AC-4 limit governs — plan for 250 cycles/h max. The auxiliary contact ratings drop with voltage: 10 A at 24 V, 2 A at 48/60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. Use the 110 V row for this coil voltage; the contact can switch 1 A at that level.
Panel integration and environmental limits
Mounting position is flexible: ±180° rotation on a vertical surface, plus ±22.5° tilt forward/backward. Clearances required: 10 mm upward, 10 mm forward, 10 mm downward, 6 mm at the side. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The screw-type terminals accept 2 x (0.5 to 1.5 mm²), 2 x (0.75 to 2.5 mm²), or 2 x 4 mm² solid or stranded. Arcing time is 10 to 15 ms; DC switching times are 7 to 13 ms.