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Siemens 3RV2021-4EA15-0BA0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4EA15-0BA0 SIRIUS Motor Protection Circuit B

MPN3RV2021-4EA15-0BA0
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Siemens SIRIUS motor protection circuit breaker 3RV2021-4EA15-0BA0, CLASS 10, 7.5 kW at 230 V, 10 kA breaking capacity at 400 V AC, screw and snap-on mounting for 35 mm DIN rail.

Siemens 3RV2021-4EA15-0BA0 datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Identification

3RV2021-4EA15-0BA0 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0

Electrical

3RV2021-4EA15-0BA0 — Electrical
ParameterValue
Rated operational current (Ie)32 A
Rated voltage20 ... 690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 3690 V
Rated impulse withstand voltage (Uimp)6 kV
Number of poles3
Power loss (AC, hot)13.25 W
Power loss, per pole (AC, hot)4.4 W

Protection & Tripping

3RV2021-4EA15-0BA0 — Protection & Tripping
ParameterValue
Overload release setting range27 ... 32 A
Instantaneous short-circuit trip current400 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)25 kA
Breaking capacity at 400 V (AC)25 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V10 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes

Endurance & Switching

3RV2021-4EA15-0BA0 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)500
Endurance, auxiliary contacts (typ.)500
Switching frequency, AC-3 (max.)15 1/h
Auxiliary CO (changeover) contacts0

Connections

3RV2021-4EA15-0BA0 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)

Mechanical

3RV2021-4EA15-0BA0 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany

Environmental

3RV2021-4EA15-0BA0 — Environmental
ParameterValue
Operating temperature-50 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m

Specifications

3RV2021-4EA15-0BA0 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

The Siemens 3RV2021-4EA15-0BA0 is a SIRIUS motor protection circuit breaker designed for motor protection, with CLASS 10 trip characteristic and integrated phase failure detection. It is rated for 7.5 kW at 230 V and delivers a breaking capacity of 10 kA at 400 V AC, meaning it can safely interrupt fault currents up to that level on a 400 V line without cascading upstream. The CLASS 10 trip class means it will trip within 10 seconds at 7.2× rated current — the standard for protecting standard induction motors during start-up, so you don't get nuisance trips on a normal acceleration curve.

Mounting and integration

Snaps onto 35 mm DIN rail per DIN EN 60715 and can also be screw-mounted. The 45 mm width (3 module spaces) fits standard enclosure rail layouts. Any mounting position is permitted, which simplifies panel layout when space is tight. Terminal connections are screw-type for the main circuit, accepting 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded wire.

Frequently asked questions

Where can I buy 3RV2021-4EA15-0BA0?

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

What is the closest functional second-source for 3RV2021-4EA15-0BA0?

The 3RV2021-4NA25 is a peer in the same SIRIUS family. The key difference is the 3RV2021-4EA15-0BA0 uses screw-type terminals for the main circuit, while the 3RV2021-4NA25 uses spring-loaded terminals. Both share the same 45 mm width and CLASS 10 trip characteristic, so a panel designed for one can accept the other without rewiring the bus bars, but terminal preparation differs.

What is 3RV2021-4EA15-0BA0's listed depth?

The depth is 97 mm, with a width of 45 mm and height of 97 mm.

Will 3RV2021-4EA15-0BA0 drop into a panel specified around 3RV2021-4NA25?

Yes — both share the same 45 mm width and mount on 35 mm DIN rail, so the footprint is identical. The only difference is the terminal type: screw-type on this unit versus spring-loaded on the 3RV2021-4NA25. The panel cut-out and bus bar positions are the same.

MPN
3RV2021-4EA15-0BA0