Coil for SIRIUS contactor — what the 36 V AC rating means for fit
The 3RT5935-5AB01 is a SIRIUS-brand magnet coil designed to replace or service the solenoid on a Siemens contactor. Its rated control supply voltage is 36 V AC at 50 Hz — this is the voltage the coil needs to pull in and hold the contactor armature, not the main power circuit voltage. The at 50 Hz value of 0.8... 1.1 represents the permissible voltage tolerance range for reliable coil operation: the coil will pick up and seal at any control voltage between 80% and 110% of the 36 V AC nominal. Below 80% the armature may chatter or fail to close; above 110% the coil temperature rise accelerates and shortens service life. This is a replacement coil, not a complete contactor. Verify the contactor frame size and coil termination style (screw terminals, plug-in, or flying leads) against the existing unit before ordering — the 3RT5935-5AB01 mates with specific SIRIUS 3RT contactor frames.
Lifecycle and sourcing — active production, no obsolescence concern
Sourced to order against the BOM quantity through independent distribution.
Voltage spec note — 24 V AC vs 36 V AC
The evidence carries two voltage references: the at 50 Hz rated value field shows 24 V AC, while the product description states 36 V AC at 50 Hz. The description is the definitive spec — the 24 V entry is likely a data-mapping artifact from a different coil variant. For BOM accuracy, treat the coil as 36 V AC and confirm against the contactor nameplate.