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Siemens 3RV1421-0GA10-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0GA10-ZX95 SIRIUS Circuit Breaker, 0.63 A, C

MPN3RV1421-0GA10-ZX95

Siemens SIRIUS transformer-protection circuit breaker, 3RV1421-0GA10-ZX95, 0.63 A rated continuous current, Class 10 trip, 100 kA breaking capacity at 400 V AC, screw terminals, DIN-rail mount, IP20 front.

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

Specifications

3RV1421-0GA10-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0GA10-ZX95 — 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-ZX95 — 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-ZX95 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-0GA10-ZX95 — 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-ZX95 — 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-ZX95 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-0GA10-ZX95 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

What this SIRIUS breaker does in a panel

Breaking capacity sits at 100 kA across the board — 240 V, 400 V, 500 V, and 690 V AC — so it handles high-fault-current panels without cascading upstream.

Integration into a panel — what fits

Depth is 96 mm. Zero clearance needed at the back or sides for cooling. Solid or stranded wire: 2x (1... 2.5 mm²) or 2x (2.5... 6 mm²) per terminal. AWG equivalent 14 to 10 for main contacts. Finely stranded with ferrule accepted. An auxiliary switch can be added. Shock rated at 25g for 11 ms — survives the shake of a nacelle or a conveyor line without tripping or loosening.

RoHS compliant with substance prohibition date 01.05.2012. Surge voltage resistance rated at 6,000 V. Finger-safe touch protection per IP20 front.

Frequently asked questions

What is the closest functional second-source — 3RV1011-0GA10?

The 3RV1011-0GA10 is a SIRIUS motor-protection breaker, not a transformer-protection variant. The 3RV1421-0GA10-ZX95 is purpose-built for transformer inrush with a Class 10 trip. They share the same DIN-rail footprint and terminal sizes, so a panel swap is physically possible, but the trip curve and application differ — verify coordination before substituting.

MPN
3RV1421-0GA10-ZX95