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Siemens 3RV2922-1CB0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2922-1CB0 SIRIUS Undervoltage Release, 24 V AC, 2

MPN3RV2922-1CB0
Active

Siemens SIRIUS undervoltage release 3RV2922-1CB0, 24 V AC 50/60 Hz, with 2 NO leading auxiliary contacts, screw terminals, for 3RV2 circuit breakers sizes S00-S3.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RV2922-1CB0 — Identification
ParameterValue
SeriesSIRIUS
Product designationundervoltage release
Frame sizeS00, S0, S2, S3
3RV2922-1CB0 — Electrical
ParameterValue
Rated insulation voltage (Ui), pollution degree 3690 V
3RV2922-1CB0 — Mechanical
ParameterValue
Height90 mm
Width18.5 mm
Depth68 mm
Mounting methodsnap-on mounting
3RV2922-1CB0 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
3RV2922-1CB0 — Specifications
ParameterValue
Design Of The Productwith 2 auxiliary contacts

Product details

The Siemens 3RV2922-1CB0 is a SIRIUS undervoltage release designed specifically for the 3RV2 family of motor circuit breakers. It drops the breaker's trip mechanism when the control voltage falls below its dropout threshold, preventing an automatic restart after a supply interruption — a standard requirement for machine safety circuits per EN 60204-1.

Compatibility and ratings

This undervoltage release fits circuit breaker sizes S00, S0, S2, and S3 within the 3RV2 series, covering the common motor-protection range from 0.1 A up to roughly 100 A depending on the breaker frame. That rating means the release is suitable for uncoated use in most control panels without derating for creepage or clearance. The 2 NO leading auxiliary contacts are wired via screw terminals, and the release carries the reference code F per EN 61346-2, which designates a protective device function.

Frequently asked questions

What is 3RV2922-1CB0 used for?

It is an undervoltage release for Siemens 3RV2 motor circuit breakers. When the 24 V AC control voltage drops below the dropout threshold, it trips the breaker, preventing automatic restart after a power interruption — a key safety function for motor circuits.

What breaker sizes does 3RV2922-1CB0 fit?

It fits 3RV2 circuit breaker sizes S00, S0, S2, and S3, covering the full SIRIUS motor-protection frame range.

What are the key ratings of 3RV2922-1CB0?

Control voltage is 24 V AC at 50/60 Hz. It has 2 NO leading auxiliary contacts with screw terminals. Insulation voltage is 690 V AC at pollution degree 3. Operating temperature is -20 to +60 °C. Width is 18.5 mm for snap-on DIN rail mounting.

Where can I buy 3RV2922-1CB0?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RV2922-1CB0