The Siemens SIRIUS 3RV1902-1AV0 is an undervoltage release designed for use with motor circuit breakers in sizes S00, S0, S2, and S3. It operates at 400 V AC at 50 Hz and 440 V AC at 60 Hz, with an insulation voltage rated at 690 V and pollution degree 3. The release snaps onto a 35 mm DIN rail and provides IP20 finger-safe touch protection on the front.
Lifecycle and sourcing
This part is a phased-out product. The manufacturer lists the preferred successor as the SIRIUS 3RV2902-1AV0. For current BOM lines or replacement needs, the 3RV1902-1AV0 is sourced to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Integration notes
The release mounts via snap-on onto a 35 mm DIN rail per DIN EN 50022. At 18.5 mm wide, it occupies a single modular slot in the panel. The front is IP20 finger-safe, so no additional cover is needed for vertical contact. The control supply voltage is AC only.