The Siemens 3RV2922-2CV1 is a SIRIUS undervoltage release designed specifically for the 3RV2 family of motor circuit breakers. It drops the breaker when coil voltage falls below the dropout threshold, protecting motors from restarting after a supply dip. Coil is rated 415 V AC at 50 Hz and 480 V AC at 60 Hz — match your line frequency and phase voltage exactly. Snap-on mounting onto a 35 mm DIN rail, 18.5 mm wide and 68 mm deep. Fits the S00, S0, S2, and S3 frame sizes of the 3RV2 breaker range. The front is IP20 finger-safe per IEC 60529, so it's safe to touch in a live panel. Comes with 2 normally-open leading auxiliary contacts (spring-type terminals) that change state before the main contacts — useful for signaling a pending trip to a PLC or safety relay. Pollution degree 3 rated, insulation voltage 690 V.
Siemens 3RV2922-2CV1 undervoltage release, 415 V AC 50 Hz /
MPN3RV2922-2CV1
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Siemens SIRIUS 3RV2922-2CV1 undervoltage release, 415 V AC 50 Hz / 480 V AC 60 Hz, with 2 NO leading auxiliary contacts, spring-type terminals, for 3RV2 circuit breakers S00/S0/S2/S3.
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | undervoltage release |
| Frame size | S00, S0, S2, S3 |
Electrical
| Parameter | Value |
|---|---|
| Rated insulation voltage (Ui), pollution degree 3 | 690 V |
Mechanical
| Parameter | Value |
|---|---|
| Height | 90 mm |
| Width | 18.5 mm |
| Depth | 68 mm |
| Mounting method | snap-on mounting |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +60 °C |
| Storage temperature | -50 ... +80 °C |
Specifications
| Parameter | Value |
|---|---|
| Design Of The Product | with 2 auxiliary contacts |
Product details
Frequently asked questions
What is the depth of 3RV2922-2CV1?
68 mm deep, 18.5 mm wide, 90 mm high.
What motor circuit breaker frames does this undervoltage release fit?
It mounts onto 3RV2 breakers in frame sizes S00, S0, S2, and S3.
How do I get current pricing and availability for 3RV2922-2CV1?
Submit an RFQ — this part is sourced to order through independent distribution, with pricing and stock confirmed at quote time.
MPN
3RV2922-2CV1