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Siemens 3RV1421-1GA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1GA10 SIRIUS Circuit Breaker, 6.3 A, Class 1

MPN3RV1421-1GA10

Siemens SIRIUS 3RV1421-1GA10, circuit breaker for transformer protection, 3-pole, 6.3 A, Class 10, 100 kA at 400 V AC, screw terminals, DIN rail mount.

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

Specifications

3RV1421-1GA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1GA10 — 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)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV1421-1GA10 — Protection & Tripping
ParameterValue
Overload release setting range4.5 ... 6.3 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)6 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-1GA10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-1GA10 — 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)
3RV1421-1GA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
Mounting positionany
3RV1421-1GA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-1GA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Accepts solid or stranded conductors: 2x (1 … 2.5 mm²) or 2x (2.5 … 6 mm²) per terminal.

Electrical and environmental ratings

Shock rated at 25g for 11 ms. Mounting position any orientation. Surge voltage resistance 6 kV. Maximum switching frequency under AC-3 duty is 15 operations per hour — fine for transformer primary switching, not for frequent motor starting.

Compliance documentation

RoHS compliance date listed as May 1, 2012 — the part meets RoHS and REACH substance restrictions as of that date. No UL or CSA listing appears in the spec record; the primary approvals are IEC/EN based. For a project requiring UL recognition, request the manufacturer's declaration or check the specific variant suffix.

Frequently asked questions

What is the breaking capacity of 3RV1421-1GA10 at 400 V?

100 kA at 400 V AC. At 690 V AC it drops to 6 kA. The 100 kA rating covers most industrial panel fault levels without requiring an upstream fuse.

Where can I buy the 3RV1421-1GA10 and how is it quoted?

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 are published here.

MPN
3RV1421-1GA10