The Siemens 3RT1924-5AC22 is a SIRIUS magnet coil designed for Size S0 contactors. It operates on 24 V AC control supply voltage at both 50 Hz and 60 Hz, drawing a holding power range of 0.8... 1.1 A at 50 Hz. This coil uses spring-type terminals for the control circuit, so it snaps onto the contactor without screw terminals — handy when you're swapping a coil in a tight panel and don't want to fish for a screwdriver. It's a direct-fit replacement for the coil on any SIRIUS Size S0 contactor (like the 3RT1026 series) that originally shipped with a 24 V AC coil — same mounting footprint, same DIN-rail integration.
Does it drop into a panel wired for a 3RT1026-1AB00?
Yes — the 3RT1924-5AC22 coil shares the same Size S0 frame and 24 V AC control voltage as the 3RT1026-1AB00 contactor's coil. The spring-type terminal on this coil is a different connection style than the screw terminals on the 3RT1026-1AB00's main circuit, but the coil itself is a direct mechanical and electrical swap for the existing 24 V AC coil in that contactor. No rewiring of the main power circuit needed.