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Siemens 3RV1421-0BA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0BA10 SIRIUS Circuit Breaker, 0.2 A, 100 kA

MPN3RV1421-0BA10

Siemens SIRIUS circuit breaker for transformer protection, 0.2 A rated current, 100 kA breaking capacity at 400 V, CLASS 10 trip, screw terminals, 45 mm width.

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

Specifications

3RV1421-0BA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0BA10 — 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
3RV1421-0BA10 — 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
3RV1421-0BA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1421-0BA10 — 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)
3RV1421-0BA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1421-0BA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1421-0BA10 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection circuit breaker, 0.2 A, 100 kA

The Siemens 3RV1421-0BA10 is a SIRIUS circuit breaker designed specifically for transformer protection, rated at 0.2 A continuous current with a 100 kA breaking capacity across 240 V, 400 V, 500 V, and 690 V AC. The CLASS 10 trip characteristic gives it a 10-second maximum trip time at 600% of rated current, matching the inrush profile of small control transformers.

The 45 mm width (3 SENTRON modular spaces) fits standard enclosure cutouts. Screw-type terminals for the main circuit accept 2x (1…2.5 mm²) solid or stranded, or 2x (2.5…6 mm²) — no ferrule needed for the larger range. Zero clearance required at the sides or rear (0 mm backwards clearance), so you can pack units tight on the rail. Any mounting position is permitted.

Protection and environmental ratings

No ground fault detection on this unit. Front face is IP20 (finger-safe), suitable for enclosed panels. Shock rated at 25g / 11 ms, so it holds calibration in high-vibration environments like near compressors or presses.

Frequently asked questions

Where can I buy 3RV1421-0BA10 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is 3RV1421-0BA10's listed depth?

The depth is 96 mm, with a width of 45 mm and height of 97 mm. Zero clearance required at the sides or rear.

What wire sizes does the 3RV1421-0BA10 accept?

Screw terminals accept 2x (1…2.5 mm²) solid or stranded, or 2x (2.5…6 mm²). AWG equivalents: 2x (14…10).

Will 3RV1421-0BA10 drop into a panel specified around 3RV1011-0GA10 without rewiring?

Both are 45 mm wide SIRIUS breakers on the same DIN rail footprint, so the mechanical swap is straightforward. However, the 3RV1421-0BA10 is a transformer-protection variant with a 0.2 A rating and CLASS 10 trip, while the 3RV1011-0GA10 is a standard motor-protection breaker — verify the trip curve and current rating match your circuit before substituting.

What compliance documentation does Siemens provide for 3RV1421-0BA10?

As a SIRUS catalog item, it carries CE marking for the European market and is designed to meet IEC/EN 60947-2 and 60947-4-1 standards. RoHS and REACH declarations are standard from Siemens. UL/CSA listings are typical for this series but should be confirmed against the specific variant at order time.

MPN
3RV1421-0BA10