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Siemens 3RV2021-1FA25 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1FA25 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1FA25
Active

Siemens SIRIUS 3RV2021-1FA25 motor protection circuit breaker, Class 10 trip class, 5 A rated current at 480/600 V, 100 kA breaking capacity at 400 V, spring-loaded terminals, screw and snap-on mounting on 35 mm DIN rail.

Siemens 3RV2021-1FA25 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

3RV2021-1FA25 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1FA25 — Electrical
ParameterValue
Rated operational current (Ie)5 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
3RV2021-1FA25 — Protection & Tripping
ParameterValue
Overload release setting range3.5 ... 5 A
Instantaneous short-circuit trip current65 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
3RV2021-1FA25 — 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
3RV2021-1FA25 — 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)
3RV2021-1FA25 — Mechanical
ParameterValue
Height119 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Mounting positionany
3RV2021-1FA25 — 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
3RV2021-1FA25 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

The Siemens 3RV2021-1FA25 is a SIRIUS-branded motor protection circuit breaker with Class 10 trip and phase failure detection. Rated 5 A at both 480 V and 600 V, this breaker handles motor full-load currents up to that point. The breaking capacity tells the real story: 100 kA at 400 V and 500 V, dropping to 4 kA at 690 V.

Mounting and wiring — panel fit

Depth is 97 mm, height 119 mm — check gland-plate clearance if the panel is shallow. Mounting position is any, which helps when the panel layout is tight. Spring-loaded terminals on the main current circuit accept 2×(0.5 … 2.5 mm²) solid or stranded wire. That's a standard control-panel wire range; no special ferrules needed.

Temperature and environment

No IP rating is listed in the evidence.

MPN
3RV2021-1FA25