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Siemens 3RV2142-4RA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2142-4RA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2142-4RA10
Active

Siemens SIRIUS 3RV2142-4RA10 motor protection circuit breaker, 84 A rated current, 50 kA breaking capacity at 400 V AC, CLASS 10 trip class, screw-type terminals, for 35 mm DIN rail.

$236.22Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2142-4RA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS3
3RV2142-4RA10 — Electrical
ParameterValue
Rated operational current (Ie)84 A
Rated voltage20 ... 690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 31 000 V
Rated impulse withstand voltage (Uimp)8 kV
Number of poles3
Power loss (AC, hot)34 W
Power loss, per pole (AC, hot)11.3 W
3RV2142-4RA10 — Protection & Tripping
ParameterValue
Overload release setting range65 ... 84 A
Instantaneous short-circuit trip current1 170 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)10 kA
Breaking capacity at 690 V (AC)6 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V3 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2142-4RA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)25 000
Endurance, auxiliary contacts (typ.)25 000
Switching frequency, AC-3 (max.)15 1/h
3RV2142-4RA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (2,5 ... 50 mm²), 1x (10 ... 70 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
3RV2142-4RA10 — Mechanical
ParameterValue
Height165 mm
Width90 mm
Depth176 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2142-4RA10 — 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
3RV2142-4RA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection with overload relay function

Product details

It is rated for a continuous current of 84 A at 400 V and 480/600 V, with a breaking capacity of 50 kA at 400 V AC — sufficient for most industrial distribution panels.

Dimensions are 90 mm wide, 165 mm high, 176 mm deep — a standard three-module-wide footprint on the rail. The screw-type terminals on the main circuit accept 2× (2.5–16 mm²) solid or 2× (2.5–50 mm²) stranded, with a single conductor up to 70 mm² stranded.

Breaking capacity and voltage ratings

Breaking capacity varies by voltage: 100 kA at 240 V, 50 kA at 400 V, 5 kA at 500 V, and 3 kA at 690 V. The 84 A rated current holds at both 480 V and 600 V. Motor horsepower ratings are provided for common North American voltages: 15 hp at 230 V, 30 hp at 220/230 V, 60 hp at 460/480 V, and 75 hp at 575/600 V.

No end-of-life notification or successor part is recorded.

Environmental limits

Mounting position is any orientation. Maximum switching frequency at AC-3 and AC-3e duty is 15 operations per hour.

Frequently asked questions

What is the breaking capacity of 3RV2142-4RA10 at 400 V?

50 kA at 400 V AC. At 240 V it is 100 kA, at 500 V it is 5 kA, and at 690 V it is 3 kA.

What trip class is the 3RV2142-4RA10?

CLASS 10, meaning it will trip within 10 seconds at 7.2× rated current, suitable for standard induction motor starting.

Where can I buy 3RV2142-4RA10?

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

Will 3RV2142-4RA10 drop into a panel specified around 3RV2021-4NA25?

Both are Siemens SIRIUS motor protection breakers on the same 35 mm DIN rail platform, but the 3RV2142-4RA10 is a larger frame (90 mm wide vs the 3RV2021 series 45 mm width) with higher current rating (84 A vs lower). Panel cutouts and wiring will need rework; they are not drop-in interchangeable.

MPN
3RV2142-4RA10