The Siemens SIRIUS 3RT1924-5AG22 is a replacement magnet coil for Size S0 contactors in the SIRIUS family. It operates on 110 V AC control voltage at both 50 Hz and 60 Hz, drawing 0.8... 1.1 A at 50 Hz. The coil uses spring-type terminals for the control wiring, which speeds up panel assembly compared to screw terminals.
This part is a phased-out product. The official successor is the SIRIUS 3RT2 series. Verify the mounting footprint and terminal arrangement of the 3RT2 successor.
The 0.8... 1.1 A at 50 Hz is the coil's inrush current range — the higher value is the pick-up current when the contactor pulls in, and the lower is the holding current once sealed. A control transformer supplying this coil must be sized for the 1.1 A peak, not the steady-state draw. The 110 V AC rating at both 50 and 60 Hz means the coil works on either supply frequency without derating, which simplifies stocking for plants with mixed-frequency zones.
Panel Integration
The coil snaps onto the Size S0 contactor body. No additional DIN-rail space is consumed; the coil mounts directly on the contactor's magnet stack.