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Siemens 3RV2021-4BA15-ZW97 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4BA15-ZW97 SIRIUS Motor Protection Circuit B

MPN3RV2021-4BA15-ZW97
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Siemens SIRIUS motor protection circuit breaker, 3RV2021-4BA15-ZW97, Class 10 trip, 45 mm width, screw and snap-on mounting for 35 mm DIN rail (DIN EN 60715).

Siemens 3RV2021-4BA15-ZW97 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-ZW97 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4BA15-ZW97 — 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-ZW97 — 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-ZW97 — 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
3RV2021-4BA15-ZW97 — 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)
3RV2021-4BA15-ZW97 — 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-ZW97 — 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
3RV2021-4BA15-ZW97 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Screw-type terminals on the main current circuit accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded conductors, with M4 screws for the main contacts.

Rated short-circuit breaking capacity varies with line voltage: 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. At 400 V the gL/gG fuse backup rating is 63 A; at 500 V and 690 V it drops to 50 A. For a panel designer coordinating with upstream fuses or a molded-case breaker, these numbers define the selectivity window — the 25 kA at 400 V covers most industrial distribution systems without requiring a current-limiting upstream device.

Frequently asked questions

Where can I buy 3RV2021-4BA15-ZW97 and get a price?

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

What is the breaking capacity of 3RV2021-4BA15-ZW97 at 400 V?

25 kA at 400 V rated value. At 240 V it is 100 kA; at 690 V it is 2 kA.

Does 3RV2021-4BA15-ZW97 detect phase failure?

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

What is the trip class of 3RV2021-4BA15-ZW97?

Class 10. It trips within 10 seconds at 7.2× the thermal setting, matching standard induction motor locked-rotor protection requirements.

MPN
3RV2021-4BA15-ZW97