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Siemens 3RV2021-1EA25 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1EA25 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1EA25
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2021-1EA25, CLASS 10 trip, 100 kA breaking capacity at 400 V, spring-loaded terminals, screw and snap-on DIN rail mount.

Siemens 3RV2021-1EA25 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

3RV2021-1EA25 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1EA25 — Electrical
ParameterValue
Rated operational current (Ie)4 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
3RV2021-1EA25 — Protection & Tripping
ParameterValue
Overload release setting range2.8 ... 4 A
Instantaneous short-circuit trip current52 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)6 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V4 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-1EA25 — 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
3RV2021-1EA25 — 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)
3RV2021-1EA25 — 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
3RV2021-1EA25 — 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
3RV2021-1EA25 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

What this breaker does in the panel

The interrupting ratings are substantial: 100 kA at 240 V, 400 V, and 500 V, dropping to 4 kA at 690 V. The 4 A rating at 480 V and 600 V tells you this is a low-current frame — sized for fractional-horsepower motors up to about 0.75 hp at 230 V.

Mounting and wiring — DIN rail fit

Spring-loaded terminals on the main current circuit accept 2× (0.5 to 2.5 mm²) solid or stranded conductors — no screw torque to verify, just strip and push. Any mounting position is allowed, so vertical or horizontal rail orientation is fine.

Frequently asked questions

How do I get current pricing and availability for 3RV2021-1EA25?

Submit an RFQ through this listing. We confirm pricing and availability at quote time through our sourcing network.

What is 3RV2021-1EA25's listed depth (97 mm) on this component line?

The depth is 97 mm. Combined with a 45 mm width and 119 mm height, it fits a standard single-module DIN-rail footprint.

Will 3RV2021-1EA25 drop into a panel that was specified around 3RV2021-1FA15 without rewiring?

Both are 45 mm wide SIRIUS motor protection breakers with the same DIN-rail mounting and spring-terminal wiring. The 1EA25 carries a CLASS 10 trip and 100 kA SCCR; the 1FA15 is a different variant. Panel cutout and rail position are identical, but verify the trip class and current rating match your motor before substitution.

MPN
3RV2021-1EA25