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Siemens 3RV2021-1AA25 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1AA25 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1AA25
Active

Siemens SIRIUS 3RV2021-1AA25, motor protection circuit breaker, 1.6 A at 480/600 V, Trip Class 10, 100 kA breaking capacity, spring-loaded terminals, screw and snap-on DIN rail mounting.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-1AA25 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1AA25 — Electrical
ParameterValue
Rated operational current (Ie)1.6 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
3RV2021-1AA25 — Protection & Tripping
ParameterValue
Overload release setting range1.1 ... 1.6 A
Instantaneous short-circuit trip current21 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)100 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V100 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-1AA25 — 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
3RV2021-1AA25 — 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)
3RV2021-1AA25 — 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
3RV2021-1AA25 — 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
3RV2021-1AA25 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated at 1.6 A at both 480 V and 600 V, it covers fractional-horsepower motors up to 1 hp at 460/480 V and 0.8 hp at 575/600 V. It detects phase failure as well as overload, so a single-phased motor won't cook on two legs. No ground-fault detection built in — that's a separate add-on or a different family member.

Spring-loaded terminals on the main current circuit accept 2× 0.5 to 2.5 mm² solid or stranded wire — no screw clamping, so you save a turn per termination. Keep the strip length clean; whiskers under the spring cage cause intermittent faults down the road. Dimensions are 97 mm deep, 45 mm wide, 119 mm tall.

The storage range is wider because it's not dissipating heat — that's the handling limit, not the running limit. Rated voltage covers 20 to 690 V AC, so it works on 24 V control transformers as well as 480 V motor circuits.

Frequently asked questions

How do I get current pricing and availability for 3RV2021-1AA25?

Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels.

When sourcing 3RV2021-1AA25, what's the closest functional alternative — 3RV2021-1GA25?

The 3RV2021-1GA25 is a sibling in the same SIRIUS family, but it uses screw terminals instead of spring-loaded terminals. The 3RV2021-1AA25 has spring terminals; if your panel was wired for screw clamps, the 1GA25 drops in without retooling. Otherwise, the 1AA25 fits the same DIN footprint and clearance envelope.

What is 3RV2021-1AA25's listed depth (97 mm) on this component line?

Depth is 97 mm, width 45 mm, height 119 mm. Clearance: 50 mm above and below, 30 mm to the sides, zero forward or backward.

Will 3RV2021-1AA25 drop into a panel that was specified around 3RV2021-1GA25 without rewiring?

It will fit the same DIN rail and clearance envelope, but the 1GA25 uses screw terminals while the 1AA25 uses spring-loaded terminals. If the panel wiring was prepared for screw clamps, you'll need to re-terminate for spring cages — same wire range, different tooling.

What compliance documentation does Siemens provide for 3RV2021-1AA25?

As a current-production SIRIUS component, it carries standard Siemens compliance documentation including RoHS, REACH, and relevant IEC/EN standards. Specific certificates are available through the Siemens Industry Online Support portal.

MPN
3RV2021-1AA25