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Siemens 3RV2902-1AS0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2902-1AS0 SIRIUS undervoltage release, 500 V AC/5

MPN3RV2902-1AS0
Active

Siemens SIRIUS undervoltage release, 500 V AC/50 Hz, 575 V AC/60 Hz, screw terminal, for 3RV2 motor circuit breakers, snap-on mounting, 19 x 90 x 68 mm.

Siemens 3RV2902-1AS0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2902-1AS0 — Identification
ParameterValue
SeriesSIRIUS
Product designationundervoltage release
Frame sizeS00, S0, S2, S3
3RV2902-1AS0 — Electrical
ParameterValue
Rated voltage690 V
3RV2902-1AS0 — Mechanical
ParameterValue
Height90 mm
Width19 mm
Depth68 mm
Mounting methodsnap-on mounting
3RV2902-1AS0 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C

Product details

The Siemens 3RV2902-1AS0 is a SIRIUS undervoltage release designed specifically for 3RV2 motor circuit breakers. It drops the breaker when the control supply voltage falls below its dropout threshold — standard practice for preventing automatic restart after a line dip or intentional shutdown. The control supply is AC, rated 500 V at 50 Hz and 575 V at 60 Hz, covering common 480 V and 575 V industrial mains without a step-down transformer. Screw-type terminals for the auxiliary and control circuit keep wiring straightforward.

The 19 mm width (one modular unit) and 68 mm depth leave room alongside the breaker in a crowded enclosure.

Frequently asked questions

What is the 3RV2902-1AS0 used for?

It is an undervoltage release for Siemens 3RV2 motor circuit breakers. When the control supply voltage drops below the dropout threshold, it trips the breaker — used to prevent automatic restart after a power dip or intentional shutdown.

What are the key ratings of 3RV2902-1AS0?

Control supply is AC, 500 V at 50 Hz and 575 V at 60 Hz. Insulation rated 690 V at pollution degree 3. Snap-on DIN rail mount, 19 mm wide, 68 mm deep. Ambient operating range -20 to +60 °C.

Where can I buy 3RV2902-1AS0?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
3RV2902-1AS0