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Siemens 3RV1421-1BA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1BA15 SIRIUS Circuit Breaker, 2 A, CLASS 10,

MPN3RV1421-1BA15

Siemens SIRIUS 3RV1421-1BA15 circuit breaker, 2 A rated continuous current, CLASS 10 trip class, 100 kA breaking capacity at 400 V AC, for transformer protection, screw-type terminals, 45 mm width.

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

Specifications

3RV1421-1BA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1BA15 — 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
3RV1421-1BA15 — Protection & Tripping
ParameterValue
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
3RV1421-1BA15 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1421-1BA15 — 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)
3RV1421-1BA15 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1421-1BA15 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1421-1BA15 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Zero clearance needed at the back or sides, so you can pack breakers tight on the rail without derating. Front face carries IP20 protection — finger-safe for a panel environment, but not for washdown. Screw-type terminals on the main circuit accept solid wire 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²), and stranded 2x (1…2.5 mm²) or 2x (2.5…6 mm²). Any mounting position works.

Auxiliary switch and ratings

The breaker includes a transverse auxiliary switch rated at 1 A at 24 V, 0.5 A at 230 V, and 0.15 A at 60 V. That covers typical PLC input or contactor coil signaling. The auxiliary contacts are separate from the main circuit — zero auxiliary contacts on the main switch means the auxiliary is a built-in add-on, not a separate block. Mechanical life of the main contacts is 100,000 operations typical.

Environmental limits

Shock rated at 25 g for 11 ms.

Frequently asked questions

What is the breaking capacity of 3RV1421-1BA15 at 400 V?

100 kA at 400 V AC. At 690 V it drops to 8 kA.

What is the closest functional second-source to 3RV1421-1BA15?

The 3RV2021-1FA15 is a peer in the same SIRIUS family but is a different generation with different breaking capacities and auxiliary configurations. The 3RV1421-1BA15 is designed specifically for transformer protection, while the 3RV2021-1FA15 is a general-purpose motor-protective breaker. They are not drop-in replacements without verifying the trip curve and mounting dimensions.

Where can I buy 3RV1421-1BA15?

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 Siemens provide for 3RV1421-1BA15?

Siemens SIRIUS products typically carry CE, UL, CSA, and CCC certifications, and are RoHS and REACH compliant. Specific declaration documents are available on request with the order.

MPN
3RV1421-1BA15