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Siemens 3RV1421-1BA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1BA10 SIRIUS Circuit Breaker, 2 A, Class 10,

MPN3RV1421-1BA10

Siemens SIRIUS 3RV1421-1BA10, circuit breaker for transformer protection, 3-pole, 2 A, Trip Class 10, 100 kA breaking capacity at 400 V AC, screw terminals, 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

3RV1421-1BA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1BA10 — 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
3RV1421-1BA10 — Protection & Tripping
ParameterValue
Overload release setting range1.4 ... 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
3RV1421-1BA10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-1BA10 — 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)
3RV1421-1BA10 — 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
3RV1421-1BA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-1BA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

The Siemens 3RV1421-1BA10 is a 3-pole SIRIUS circuit breaker specifically designed for transformer protection. It carries a continuous rated current of 2 A and is rated for a maximum voltage of 690 V.

Breaking capacity — where it fits

The 45 mm width means it takes up one standard 45 mm module on the rail. Terminals accept solid or stranded wire: 2× (1 to 2.5 mm²) or 2× (2.5 to 6 mm²) per pole. Finger-safe touch protection is built in, so no additional terminal covers are needed for IP20 front protection.

Protection features

Includes phase failure detection — if one phase drops out, the breaker trips, preventing single-phasing damage to the transformer. No ground fault detection on this variant. An auxiliary switch can be added via the product extension slot.

Frequently asked questions

What is the breaking capacity of the 3RV1421-1BA10 at 400 V?

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

Where can I buy the 3RV1421-1BA10?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What compliance documentation does the 3RV1421-1BA10 carry?

The substance prohibitance date of 01.05.2012 confirms RoHS compliance. The part carries IP20 front protection and finger-safe touch protection per IEC standards.

MPN
3RV1421-1BA10