SIRIUS magnet coil for contactor — 36 V AC, size S00
The Siemens SIRIUS 3RT5934-5AR61 is a magnet coil for contactors, designed to energize the contactor's main and auxiliary contacts when its 36 V AC control voltage is applied. It is rated for 400 V at 50 Hz and 440 V at 60 Hz, with a voltage tolerance of 0.8 to 1.1 times the rated value — meaning the coil holds in reliably down to about 29 V and up to 40 V at 50 Hz, a typical margin for industrial control circuits that see brownout or line sag.
Panel integration — DIN-rail footprint
The SIRIUS S00 contactor footprint is compact — 45 mm wide, 73 mm deep — so this coil swap fits inside existing panel layouts without re-drilling or re-routing. No special tools beyond a screwdriver for the screw-type terminals on the control circuit.