The 3RT2017-2BF42: The 110 V AC coil at 50/60 Hz operates between 0.8 and 1.1 times the rated value, giving a pick-up range of 88–121 V — useful when the control transformer is shared with other loads and voltage sag is a concern. This speeds panel wiring compared to screw terminals, especially on repetitive builds where torque verification is a step you can skip.
Switching frequency and duty-cycle limits
The AC-3e rating also sits at 750 cycles/h. These are the maximum mechanical limits at rated load — if your application cycles faster, the contactor needs derating or a larger frame. Mechanical service life is typical 30 million operations.
Panel fit and mounting flexibility
Dimensions are 45 mm wide, 70 mm high, and 73 mm deep.
Environmental limits and sourcing status
Sourced through authorized distribution channels. The paperwork — RoHS, REACH, UL, IEC declarations — is standard with Siemens and included with the shipment.