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Siemens 3RV2021-4CA10-0BA0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4CA10-0BA0 SIRIUS Motor Protection Circuit B

MPN3RV2021-4CA10-0BA0
Active

Siemens SIRIUS, motor protection circuit breaker, S0 frame, Trip Class 10, 5.5 kW at 230 V, 25 kA at 400 V, screw and snap-on mounting onto 35 mm DIN rail.

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

3RV2021-4CA10-0BA0 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4CA10-0BA0 — Electrical
ParameterValue
Rated operational current (Ie)22 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
3RV2021-4CA10-0BA0 — Protection & Tripping
ParameterValue
Overload release setting range16 ... 22 A
Instantaneous short-circuit trip current286 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
3RV2021-4CA10-0BA0 — 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
3RV2021-4CA10-0BA0 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
3RV2021-4CA10-0BA0 — 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
3RV2021-4CA10-0BA0 — 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
3RV2021-4CA10-0BA0 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated motor power at 230 V is 5.5 kW, and the breaker carries a short-circuit breaking capacity of 25 kA at 400 V AC. That 25 kA figure is the SCCR at the load side terminals — sufficient for most industrial distribution panels with a transformer upstream. For higher fault levels, the breaker coordinates with upstream fuses: the evidence specifies gG 63 A at 400 V, gG 50 A at 500 V, and gG 50 A at 690 V as maximum back-up fuse ratings. Ground fault detection is not included, so for sensitive earth-leakage protection, a separate residual current device is needed downstream.

Its footprint is 45 mm wide × 97 mm high × 97 mm deep, with clearance requirements of 50 mm upward and downward, 30 mm to the side, and zero clearance forward or backward. That zero forward clearance means it can be mounted flush against a gland plate or back panel without derating — useful for tight enclosures. The screw-type terminals on the main current circuit accept 2× (1 to 2.5 mm²) or 2× (2.5 to 10 mm²) solid or stranded copper, terminated with a Pozidriv size 2 screwdriver tip (shaft diameter 5 to 6 mm).

Frequently asked questions

What is the closest functional second-source for 3RV2021-4CA10-0BA0?

The closest functional peer within the same SIRIUS S0 family is the 3RV2021-4CA25, which shares the same frame size, Trip Class 10, and DIN rail mounting. The key difference is the thermal overload setting range — the 4CA10 variant covers a lower current band than the 4CA25. Verify your motor FLA against the specific setting range of each before substituting.

Will 3RV2021-4CA10-0BA0 drop into a panel that was specified around 3RV2021-4CA25 without rewiring?

Yes, both are S0 frame breakers with identical 45 mm width, 97 mm depth, and screw-type terminals accepting the same conductor sizes. The mounting hole pattern and DIN rail clip are the same. No rewiring or panel modification is needed — just verify the overload setting range matches the motor.

Where can I buy 3RV2021-4CA10-0BA0 and how is it quoted?

This part is sourced through independent industrial distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
3RV2021-4CA10-0BA0