24 V DC coil for SIRIUS contactor size S2
The 3RT5934-5BB41 is a replacement magnet coil for Siemens SIRIUS contactors in frame size S2, operating on 24 V DC control voltage with a screw-type terminal connection.
When the contactor coil fails
The 3RT5934-5BB41 is the direct swap for a SIRIUS size S2 contactor with screw terminals; measure the DC resistance across the old coil and compare to a known-good unit before condemning the driver card. Screw connection means no crimp tool needed for the field swap — strip, insert, torque. The coil draws from the 24 V DC bus; confirm the supply can deliver the inrush current without dropping below the pick-up voltage.
If your panel uses a different coil voltage or terminal type, the 3RT5934 family covers other variants.