What this part is
The Siemens SIRIUS 3RT1924-5AV01 is a replacement magnet coil for Size S0 contactors in the SIRIUS family. It operates on a 400 V AC control supply at 50 Hz, with a screw-type terminal connection.
Lifecycle and sourcing reality
This part is a phased-out product. The manufacturer lists a direct successor: the SIRIUS 3RT2924-5AV01. For a BOM line that specifies the 3RT1924-5AV01, the successor is the preferred drop-in replacement, but sourcing the original code through surplus or broker channels remains possible — quoted to order against an RFQ.
Key rating — what it means for fit
Rated at 400 V AC, 50 Hz, with an operating range of 0.8 to 1.1 times the rated voltage — meaning the coil will pick up and hold reliably between 320 V and 440 V AC. This tolerance covers typical line sag without dropping out the contactor.
Panel integration
Designed for Size S0 contactors in the SIRIUS family, which mount via screw and snap-on onto 35 mm DIN rail per EN 50022. The coil swaps in without removing the contactor from the rail — release the armature, unclip the old coil, slide in the replacement.