Skip to main content
Log in
Siemens 3RV2021-4FA10-0BA0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4FA10-0BA0 SIRIUS Motor Protection Circuit B

MPN3RV2021-4FA10-0BA0
Active

Siemens SIRIUS motor protection circuit breaker, size S0, Class 10 trip, screw terminals, 3RV2021-4FA10-0BA0.

Siemens 3RV2021-4FA10-0BA0 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

3RV2021-4FA10-0BA0 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4FA10-0BA0 — Electrical
ParameterValue
Rated operational current (Ie)40 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)16.25 W
Power loss, per pole (AC, hot)5.4 W
3RV2021-4FA10-0BA0 — Protection & Tripping
ParameterValue
Overload release setting range34 ... 40 A
Instantaneous short-circuit trip current480 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)20 kA
Breaking capacity at 500 V (AC)6 kA
Breaking capacity at 690 V (AC)3 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
3RV2021-4FA10-0BA0 — 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
3RV2021-4FA10-0BA0 — 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
3RV2021-4FA10-0BA0 — 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
3RV2021-4FA10-0BA0 — Environmental
ParameterValue
Operating temperature-50 ... +40 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2021-4FA10-0BA0 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Motor protection circuit breaker, size S0

The interrupting ratings are what you need for coordination studies: 100 kA at 240 V, 10 kA at 400 V, 3 kA at 500 V, and 2 kA at 690 V. That 10 kA at 400 V covers most industrial panelboard fault levels without needing upstream current-limiting fuses. Width is 45 mm.

The S0 frame accepts screw-type terminals sized for 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper. Terminal screws are M4, requiring a Pozidriv size 2 tip or a 5–6 mm diameter screwdriver shaft. Clearance requirements: 70 mm upward and downward, 30 mm at the sides, zero forward or backward. Rated operational voltage covers 20…690 V. Maximum switching frequency at AC-3 duty is 15 operations per hour.

Protection features

Ground fault detection is not integrated; that requires an external module or a separate ground-fault relay.

MPN
3RV2021-4FA10-0BA0