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Siemens 3RV1421-1DA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1DA10 SIRIUS Circuit Breaker, 3.2 A, Class 1

MPN3RV1421-1DA10

Siemens SIRIUS circuit breaker, 3RV1421-1DA10, for transformer protection, 3.2 A rated continuous current, Class 10 trip, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front.

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

Specifications

3RV1421-1DA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1DA10 — 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
3RV1421-1DA10 — Protection & Tripping
ParameterValue
Overload release setting range2.2 ... 3.2 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)8 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-1DA10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-1DA10 — 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)
3RV1421-1DA10 — 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
3RV1421-1DA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-1DA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection MCCB with Class 10 trip

The 3.2 A continuous current rating sets the maximum load the breaker can carry indefinitely without tripping — match this to the transformer's full-load amperage. Power dissipation is 7.25 W total, or 2.4 W per pole — factor this into panel thermal calculations to avoid derating.

Mounting and wiring integration

Accepts solid or stranded conductors: 2x 1–2.5 mm² and 2x 2.5–6 mm² per terminal, or AWG 14–10. The 45 mm width occupies one standard modular slot. Clearance: 0 mm backwards and 0 mm at the side — can be mounted flush against adjacent devices. Any mounting position is permitted.

Shock resistance is 25g for 11 ms. Surge voltage resistance rated at 6000 V. Touch protection is finger-safe. RoHS compliance date is 01.05.2012. The front panel is IP20.

Frequently asked questions

How do I get current pricing and availability for 3RV1421-1DA10?

Submit an RFQ through this listing. The part is sourced to order through independent distribution, with availability and current pricing confirmed at quote time.

What is the breaking capacity of 3RV1421-1DA10 at 400 V?

The breaking capacity is 100 kA at 400 V AC. At 690 V AC it drops to 8 kA.

What compliance documentation is available for 3RV1421-1DA10?

The part carries a RoHS compliance date of 01.05.2012. It is designed to meet IEC/EN standards for circuit breakers, with IP20 front protection and finger-safe touch protection.

MPN
3RV1421-1DA10