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Siemens 3RV6902-1AP0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV6902-1AP0 SIRIUS Undervoltage Release, 230/240 V

MPN3RV6902-1AP0

Siemens SIRIUS undervoltage release, 3RV6902-1AP0, 230 V AC 50 Hz / 240 V AC 60 Hz, for circuit breaker size S00/S0, snap-on mounting, screw-type terminals.

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

3RV6902-1AP0 — Identification
ParameterValue
SeriesSIRIUS
Product designationundervoltage release
Frame sizeS00, S0
3RV6902-1AP0 — Electrical
ParameterValue
Rated voltage690 V
3RV6902-1AP0 — Mechanical
ParameterValue
Height90 mm
Width19 mm
Depth68 mm
Mounting methodsnap-on mounting
3RV6902-1AP0 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C

Product details

Undervoltage release for SIRIUS S00/S0 breakers

The Siemens 3RV6902-1AP0 is a SIRIUS undervoltage release designed specifically for motor circuit breakers in frame sizes S00 and S0. The break time is a maximum of 20 ms — fast enough to drop the main contactor before a downstream fault escalates.

Integration into a motor circuit breaker panel

The release snaps onto the left side of a SIRIUS 3RV2 motor circuit breaker in frame S00 or S0. The 19 mm width means it adds minimal DIN rail real estate — useful when the panel is already tight on fill factor. The screw terminals accept the control wiring; no auxiliary contacts are integrated (leading contact 0, instantaneous contact 0), so any remote status indication must come from the breaker's own auxiliary switch block. The 68 mm depth is shallower than a full-frame breaker, so it does not increase the overall panel depth beyond what the breaker itself requires.

The reference code per EN 61346-2 is F, which classifies it as a protective device in the function-oriented designation system. The design of short-circuit protection is fuse-based, consistent with the SIRIUS system architecture.

Frequently asked questions

What is the 3RV6902-1AP0 used for?

It is an undervoltage release for Siemens SIRIUS motor circuit breakers in frame sizes S00 and S0. When the control voltage (230 V AC 50 Hz or 240 V AC 60 Hz) drops below the dropout threshold, the release trips the breaker, protecting the motor from undervoltage conditions or enabling a controlled stop on power loss.

What are the key ratings of the 3RV6902-1AP0?

Rated control supply voltage is 230 V AC at 50 Hz and 240 V AC at 60 Hz. Rated insulation voltage is 690 V with pollution degree 3. Maximum break time is 20 ms. Operating temperature range is -20 to +60 °C.

Will the 3RV6902-1AP0 fit a panel designed for the 3RV6021-4DA10?

No — the 3RV6021-4DA10 is a full motor circuit breaker (45 mm wide, 96 mm deep), while the 3RV6902-1AP0 is a side-mounted undervoltage release (19 mm wide, 68 mm deep). They serve different functions and occupy different positions in the panel. The release mounts onto the breaker, not in place of it.

Where can I buy the 3RV6902-1AP0?

This part is 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 commitment.

MPN
3RV6902-1AP0