The Siemens SIRIUS 3RT1935-5AG22 is a replacement magnet coil for Size S2 contactors in the SIRIUS family, rated 110 V AC at both 50 Hz and 60 Hz. It uses spring-loaded connection technology for the coil terminals — no screwdriver needed for the control wiring, which speeds up panel assembly and reduces the risk of loose connections on a vibrating contactor.
This coil is a phased-out product. The manufacturer's official successor is the SIRIUS 3RT2 series coil. No last-time-buy window remains open through the factory channel.
The coil mounts onto SIRIUS Size S2 contactor frames. The 110 V AC control voltage is common across European panel designs; the dual 50/60 Hz rating means the same coil works on 50 Hz mains or 60 Hz genset supplies without a change.