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Siemens 3RV1421-0GA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0GA10 SIRIUS Circuit Breaker, 0.63 A, CLASS

MPN3RV1421-0GA10

Siemens SIRIUS 3RV1421-0GA10 circuit breaker for transformer protection, 0.63 A, CLASS 10, 100 kA breaking capacity at 400 V, screw terminals, IP20 front, snap-on DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RV1421-0GA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0GA10 — Electrical
ParameterValue
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated impulse withstand voltage (Uimp)6 000 V
Number of poles3
Power loss (AC, hot)5.5 W
Power loss, per pole (AC, hot)1.8 W
3RV1421-0GA10 — Protection & Tripping
ParameterValue
Overload release setting range0.45 ... 0.63 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)100 kA
Breaking capacity at 500 V (AC)100 kA
Breaking capacity at 690 V (AC)100 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-0GA10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-0GA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV1421-0GA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting positionany
3RV1421-0GA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-0GA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection circuit breaker, 0.63 A, CLASS 10

Breaking capacity hits 100 kA at 240 V, 400 V, 500 V, and 690 V AC, so it handles high-fault-current scenarios common in industrial distribution without cascading upstream.

Screw-type terminals on both main and auxiliary circuits accept solid or stranded wire: 2x (1…2.5 mm²) and 2x (2.5…6 mm²), or AWG 14–10 for the main contacts. The 45 mm width and 96 mm depth fit standard enclosure cutouts.

Operating conditions and ratings

Shock resistance is 25g for 11 ms, so it holds up in high-vibration environments like conveyor drives or compressor skids. Power dissipation is 5.5 W total in hot operating state (1.8 W per pole), which matters for enclosure thermal calculations — derate if you're packing multiple units in a sealed box. Maximum switching frequency is 15 operations per hour at AC-3 duty; surge voltage resistance is 6 kV. Auxiliary switch extension is supported if you need remote status feedback.

Frequently asked questions

Where can I buy 3RV1421-0GA10?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers here, but we can get you a firm quote quickly.

What is the closest functional second-source for 3RV1421-0GA10?

The 3RV1011-0GA10 is a similar SIRIUS motor-protective circuit breaker but lacks the transformer-specific trip curve and the 100 kA breaking capacity across all voltages — the 3RV1421-0GA10 is the correct choice for transformer primary protection where high fault current and CLASS 10 timing are specified.

What compliance documentation does Siemens provide for 3RV1421-0GA10?

RoHS compliance is confirmed with a substance prohibition date of 01.05.2012; REACH, UL, IEC, and other regional certifications are standard for the SIRIUS series and available through the Siemens documentation portal.

MPN
3RV1421-0GA10