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Siemens 3RV1421-0GA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0GA15 SIRIUS Circuit Breaker, 0.63 A, Class

MPN3RV1421-0GA15

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-0GA15, 0.63 A continuous, Trip Class 10, 100 kA breaking capacity at 400 V AC, screw and snap-on 35 mm DIN rail, IP20 front.

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

3RV1421-0GA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0GA15 — 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
3RV1421-0GA15 — 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
3RV1421-0GA15 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-0GA15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV1421-0GA15 — 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
3RV1421-0GA15 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-0GA15 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

The Siemens 3RV1421-0GA15 is a SIRIUS circuit breaker specifically designed for transformer protection, carrying a continuous current rating of 0.63 A and Trip Class 10 thermal overload protection. Its 100 kA breaking capacity holds across all AC voltages up to 690 V — so it can safely interrupt a fault on the secondary side of a small control transformer without upstream coordination headaches. The screw-type terminals on both main and auxiliary circuits accept solid conductors from 0.5 to 2.5 mm² and stranded up to 6 mm², which covers the typical wire sizes for a 0.63 A branch.

Mounting and integration

Mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 50022, with zero clearance required at the sides or rear. The 45 mm width and 96 mm depth fit standard panel layouts; any mounting position is permitted. IP20 on the front means it's protected against finger contact but not washdown — keep it inside a closed enclosure.

Frequently asked questions

What is the breaking capacity of 3RV1421-0GA15 at 400 V?

100 kA at 400 V AC, and the same 100 kA rating holds at 240 V, 500 V, and 690 V AC — so it provides consistent fault interruption across the full voltage range.

What compliance documentation does Siemens provide for 3RV1421-0GA15?

The part carries a substance prohibitance date of 01.05.2012, indicating RoHS compliance. The SIRIUS series typically includes CE, UL, and CSA certifications; specific approval markings should be verified on the nameplate or via the manufacturer's declaration.

Where can I buy 3RV1421-0GA15 and how is it quoted?

This part is sourced to order through independent distribution. Submit an RFQ for current pricing and availability — quotes are confirmed at the time of request, not from a static listing.

MPN
3RV1421-0GA15