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Siemens 3RV2021-4BA15-0BA0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4BA15-0BA0 SIRIUS Motor Circuit Breaker, Cla

MPN3RV2021-4BA15-0BA0
Active

Siemens SIRIUS, motor-protective circuit breaker, 3RV2021-4BA15-0BA0, Class 10, 5.5 kW at 230 V, 45 mm wide, screw terminals.

Siemens 3RV2021-4BA15-0BA0 datasheet (PDF)
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

3RV2021-4BA15-0BA0 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4BA15-0BA0 — Electrical
ParameterValue
Rated operational current (Ie)20 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)10.5 W
Power loss, per pole (AC, hot)3.5 W
3RV2021-4BA15-0BA0 — Protection & Tripping
ParameterValue
Overload release setting range13 ... 20 A
Instantaneous short-circuit trip current260 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)55 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V100 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
3RV2021-4BA15-0BA0 — 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
3RV2021-4BA15-0BA0 — 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)
3RV2021-4BA15-0BA0 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Mounting positionany
3RV2021-4BA15-0BA0 — 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
3RV2021-4BA15-0BA0 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated at 5.5 kW at 230 V, it covers small-to-medium motor loads common on conveyor drives, pumps, and fans.

Short-circuit ratings and selectivity

The interrupting ratings are the deciding factor for panel SCCR compliance: 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. For gG fuse-listed backup protection, the rated values are 63 A at 400 V, 50 A at 500 V, and 50 A at 690 V — relevant when coordinating with a downstream motor starter or soft starter.

Termination is screw-type terminals for the main current circuit, accepting 2×(0.5–1.5 mm²) or 2×(0.75–2.5 mm²) solid or stranded. The M4 main-contact screws are standard for panel wiring.

Frequently asked questions

What is the closest functional second-source to 3RV2021-4BA15-0BA0?

The 3RV2021-4CA25 is a close sibling within the same SIRIUS 3RV2 family, but the exact trip setting range and terminal configuration differ. Verify the specific motor FLA and coordination study before substituting — the 4BA15-0BA0 has its own unique rating code.

Where can I buy 3RV2021-4BA15-0BA0 and how is it quoted?

This part is sourced through independent industrial-automation distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a binding commercial offer.

Does 3RV2021-4BA15-0BA0 detect phase failure?

Yes, phase failure detection is built in. The breaker will trip if one line phase is lost, protecting the motor from single-phasing.

MPN
3RV2021-4BA15-0BA0