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Siemens 3RV2042-4RA10 — Motor Protection Circuit Breakers (MPCB)

Siemens SIRIUS 3RV2042-4RA10 Motor Protection Circuit Breake

MPN3RV2042-4RA10
Active

Siemens SIRIUS 3RV2042-4RA10, motor protection circuit breaker, 84 A, CLASS 10, 100 kA at 400 V AC, screw terminals, 70 x 165 x 176 mm.

Siemens 3RV2042-4RA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2042-4RA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS3
3RV2042-4RA10 — 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
3RV2042-4RA10 — 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
3RV2042-4RA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)25 000
Endurance, auxiliary contacts (typ.)25 000
Switching frequency, AC-3 (max.)15 1/h
3RV2042-4RA10 — 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 (2.5 ... 35 mm²), 1x (2.5 ... 50 mm²)
3RV2042-4RA10 — Mechanical
ParameterValue
Height165 mm
Width70 mm
Depth176 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2042-4RA10 — 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
3RV2042-4RA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

The breaker also includes phase failure detection, so if one phase drops out, it trips before single-phasing damages the motor windings.

Rated at 84 A continuous, this breaker handles motor full-load currents up to that level. Motor horsepower ratings are given for common North American voltages: 30 hp at 220/230 V, 60 hp at 460/480 V, and 75 hp at 575/600 V. For 400 V systems, the rated operational current is 84 A.

The 70 mm width takes a standard three-module slot on the rail. Depth is 176 mm, height 165 mm — check your enclosure depth if using a shallow gland plate. Terminal capacity for the main circuit is 2x (2.5 to 16 mm²) solid or 1x (10 to 70 mm²) stranded, using screw-type terminals.

Frequently asked questions

Where can I buy 3RV2042-4RA10 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability confirmation.

What is the breaking capacity of 3RV2042-4RA10 at 400 V?

The breaking capacity is 100 kA at 400 V AC. At 690 V AC it is 6 kA.

What clearance is needed around the 3RV2042-4RA10 in the panel?

150 mm above and below, 30 mm at the sides for arc flash venting and heat dissipation.

Does 3RV2042-4RA10 detect phase failure?

Yes, it includes phase failure detection, so it will trip if one phase is lost, preventing single-phasing damage to the motor.

MPN
3RV2042-4RA10