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Siemens 3RV1421-0DA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0DA10 SIRIUS Circuit Breaker, 0.32 A, 100 kA

MPN3RV1421-0DA10

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-0DA10, 0.32 A rated continuous current, 100 kA breaking capacity at 400 V AC, CLASS 10 trip class, screw-type terminals, 45 mm width.

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

Specifications

3RV1421-0DA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0DA10 — 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
3RV1421-0DA10 — 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)100 kA
Phase-failure detectionYes
Ground-fault detectionNo
3RV1421-0DA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1421-0DA10 — 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)
3RV1421-0DA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1421-0DA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1421-0DA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection circuit breaker, 0.32 A, 100 kA

Rated short-circuit breaking capacity is 100 kA at 240 V, 400 V, 500 V, and 690 V AC — a flat high-interrupting rating that holds across common industrial voltages. This lets the breaker clear a bolted fault at the transformer terminals without relying on an upstream fuse or MCCB, simplifying coordination studies. The surge voltage resistance is rated at 6000 V, matching the impulse withstand typical of IEC 60947-2 for industrial panels.

Any mounting position is allowed. Main circuit connections use screw-type terminals accepting 2x (1 to 2.5 mm²) solid or stranded, or 2x (2.5 to 6 mm²) — covers common panel wire sizes. AWG equivalents are 2x (14 to 10). The breaker includes an auxiliary switch (yes), but no auxiliary contacts are pre-fitted (0), so an external auxiliary contact block must be ordered separately if status feedback is needed.

Environmental and mechanical limits

Shock resistance is 25g for 11 ms, suitable for machine-mounted applications. Maximum altitude is 2000 m without derating. Mechanical endurance is 100 000 cycles typical for the main contacts.

Frequently asked questions

What is the breaking capacity of 3RV1421-0DA10 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.

What is the trip class of 3RV1421-0DA10?

CLASS 10 — it will trip within 10 seconds at 7.2× rated current, designed for transformer inrush protection.

Where can I buy 3RV1421-0DA10?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

Does 3RV1421-0DA10 include phase failure detection?

Yes, phase failure detection is built in. Ground fault detection is not included.

What is the mounting method for 3RV1421-0DA10?

Screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 50022. Any mounting position is allowed, with zero clearance needed at the back or sides.

MPN
3RV1421-0DA10