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Siemens 3RV2021-4CA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4CA15 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-4CA15
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2021-4CA15, 45 mm width, Trip Class 10, 100 kA breaking capacity at 240 V, screw and snap-on DIN-rail mounting.

$50.80Ref. price · indicative, final on quote
Siemens 3RV2021-4CA15 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

3RV2021-4CA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4CA15 — 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
3RV2021-4CA15 — 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
3RV2021-4CA15 — 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
3RV2021-4CA15 — 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)
Conductor range, AWG (main contacts)2x (16 ... 12), 2x (14 ... 8)
3RV2021-4CA15 — 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
3RV2021-4CA15 — 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
3RV2021-4CA15 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Motor-protection circuit breaker, SIRIUS 3RV2, 45 mm

Ground fault detection is not included.

Breaking capacity and back-up fusing

Rated breaking capacity reaches 100 kA at 240 V, dropping to 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. For installations requiring higher fault current withstand at the higher voltages, the back-up fuse ratings are specified: gL/gG 63 A at 400 V, 50 A at 500 V, and 50 A at 690 V. The AC-3e switching frequency is rated at a maximum of 15 operations per hour — adequate for motor starting duty on pumps, fans, and compressors, but not for high-cycle jogging applications.

Mounting position is any orientation. Main contact terminals accept M4 screws; the control circuit terminals accept solid or stranded wire: 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²).

Frequently asked questions

How do I get current pricing and availability for 3RV2021-4CA15?

Submit an RFQ through this listing; availability and current pricing are confirmed at quote time through independent distribution channels.

What is the closest functional alternative to 3RV2021-4CA15?

The 3RV2021-4CA25 is the closest peer within the same SIRIUS 3RV2 family. Both share the same 45 mm width, Trip Class 10, and DIN-rail mounting. The key difference is the thermal setting range — verify your motor FLA against the 4CA25's adjustment range before substituting.

Will 3RV2021-4CA15 drop into a panel specified around 3RV2021-4CA25 without rewiring?

Yes, both share the same 45 mm width, 97 mm depth, DIN-rail snap-on mounting, and M4 main contact terminals. No panel rework or rewiring is required for the mechanical fit.

What compliance documentation does Siemens provide for 3RV2021-4CA15?

Standard Siemens SIRIUS documentation includes the declaration of conformity (CE), UL/CSA file, and RoHS/REACH compliance declarations. These are available on request with the order.

MPN
3RV2021-4CA15