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Siemens 3RV2021-4CA40 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4CA40 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-4CA40

Siemens SIRIUS, motor protection circuit breaker, 3RV2021-4CA40, Trip Class 10, 25 kA at 400 V, 45 mm wide, screw and snap-on mounting on 35 mm DIN rail.

Siemens 3RV2021-4CA40 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

3RV2021-4CA40 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4CA40 — 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
3RV2021-4CA40 — 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
3RV2021-4CA40 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Endurance, auxiliary contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
Auxiliary CO (changeover) contacts0
3RV2021-4CA40 — Connections
ParameterValue
Main-circuit terminal typeRing cable lug connection
Main-circuit connector arrangementTop and bottom
3RV2021-4CA40 — 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
3RV2021-4CA40 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2021-4CA40 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Motor protection circuit breaker, Trip Class 10, 25 kA at 400 V

The 25 kA at 400 V rating is the short-circuit breaking capacity that governs selectivity with upstream fuses or breakers. For the main current circuit, the connection uses ring cable lug with M4 screw terminals. The rated value range spans 20 to 690 V, covering most low-voltage motor applications.

Mounting position is any. Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards, 0 mm backwards. The 97 mm depth and 97 mm height fit standard enclosure depths.

Frequently asked questions

What is the breaking capacity of 3RV2021-4CA40 at 400 V?

The breaking capacity is 25 kA at 400 V. At 240 V it reaches 100 kA, and at 690 V it is 2 kA.

What are the mounting clearances for 3RV2021-4CA40?

Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards, 0 mm backwards.

Does 3RV2021-4CA40 include phase failure detection?

Yes, phase failure detection is included. Ground fault detection is not included.

Where can I buy 3RV2021-4CA40?

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

MPN
3RV2021-4CA40