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Siemens 3RV2021-1DA25 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1DA25 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1DA25
Active

Siemens SIRIUS 3RV2021-1DA25 motor protection circuit breaker, CLASS 10 trip, 100 kA SCCR at 400 V, 45 mm wide, screw/snap-on DIN rail, spring-loaded terminals.

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

3RV2021-1DA25 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1DA25 — Electrical
ParameterValue
Rated operational current (Ie)3.2 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)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV2021-1DA25 — Protection & Tripping
ParameterValue
Overload release setting range2.2 ... 3.2 A
Instantaneous short-circuit trip current42 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)100 kA
Breaking capacity at 500 V (AC)100 kA
Breaking capacity at 690 V (AC)10 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V10 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-1DA25 — 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
3RV2021-1DA25 — Connections
ParameterValue
Main-circuit terminal typespring-loaded terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²)
Conductor range, AWG (main contacts)2x (18 ... 8)
3RV2021-1DA25 — Mechanical
ParameterValue
Height119 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2021-1DA25 — 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
3RV2021-1DA25 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

It combines a circuit breaker and overload relay in one device, with phase failure detection built in — no separate overload block needed. Rated for CLASS 10 trip, it matches the thermal curve of standard induction motors and protects against overload, short-circuit, and phase loss. The main circuit uses spring-loaded terminals (2x 0.5–2.5 mm² solid or stranded), so no screw torque check on the power side — just strip and push.

Integration fit

At 45 mm wide, 119 mm high, and 97 mm deep, it fits a standard 45 mm slot on a DIN rail — same footprint as the 3RV1011 series. Clearance: 50 mm above and below, 30 mm at the sides, 0 mm forward/backward — so it can butt against adjacent devices on the rail.

Ratings at a glance

Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 120/125/230 V, 0.15 A at 60 V. Maximum switching frequency 15 operations per hour at AC-3 / AC-3e duty. Motor horsepower ratings: 0.75 hp at 220/230 V, 0.5 hp at 200/208 V, 0.25 hp at 230 V, 0.1 hp at 110/120 V. Current settings: 3.2 A at 480 V and 600 V.

Frequently asked questions

What is the SCCR of 3RV2021-1DA25?

100 kA at 240 V, 400 V, and 500 V; 10 kA at 690 V. This is the short-circuit current rating — the maximum fault current the breaker can safely interrupt at those voltages.

Does 3RV2021-1DA25 include phase failure protection?

Yes, phase failure detection is built in — no separate phase-loss relay required.

Where can I buy 3RV2021-1DA25?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RV2021-1DA25