Skip to main content
Log in
Siemens 3RV2142-4YA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2142-4YA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2142-4YA10
Active

Siemens SIRIUS 3RV2142-4YA10 motor protection circuit breaker, 93 A at 480/600 V, 50 kA breaking capacity at 400 V, Trip Class 10, screw terminals, DIN rail mount.

Siemens 3RV2142-4YA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2142-4YA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS3
3RV2142-4YA10 — Electrical
ParameterValue
Rated operational current (Ie)93 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)39 W
Power loss, per pole (AC, hot)13 W
3RV2142-4YA10 — Protection & Tripping
ParameterValue
Overload release setting range75 ... 93 A
Instantaneous short-circuit trip current1 300 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
3RV2142-4YA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)25 000
Endurance, auxiliary contacts (typ.)25 000
Switching frequency, AC-3 (max.)15 1/h
3RV2142-4YA10 — 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)
3RV2142-4YA10 — 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
3RV2142-4YA10 — 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
3RV2142-4YA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection with overload relay function

Product details

Motor Protection Circuit Breaker with Overload Relay Function

Rated for 93 A at both 480 V and 600 V, this breaker handles motor loads up to 75 hp at 460/480 V and 100 hp at 575/600 V, making it suitable for medium-horsepower pump, fan, and conveyor applications in industrial panels.

Breaking Capacity and Voltage Rating

The 3RV2142-4YA10 delivers 100 kA breaking capacity at 240 V AC, dropping to 50 kA at 400 V, 5 kA at 500 V, and 3 kA at 690 V. The rated operational voltage spans 20 to 690 V, covering low-voltage motor circuits from small control transformers up to 690 V industrial supplies.

Screw-type terminals on the main circuit accept 2x (2.5 to 16 mm²) solid or 2x (2.5 to 50 mm²) stranded, with a single conductor up to 70 mm² — flexible enough for the incoming supply and motor cable in a typical MCC bucket.

Frequently asked questions

What is 3RV2142-4YA10's listed depth (176 mm) on this component line?

The 3RV2142-4YA10 has a depth of 176 mm, which is the dimension from the DIN rail mounting surface to the front of the device — important for enclosure depth planning.

Will 3RV2142-4YA10 drop into a panel that was specified around 3RV2021-4NA25 without rewiring?

The 3RV2142-4YA10 is a physically larger device (90 mm wide, 165 mm high, 176 mm deep) compared to the 3RV2021 series breakers, so it will not drop into the same DIN rail footprint without panel rework. Terminal sizing also differs — the 3RV2142-4YA10 accepts up to 70 mm² stranded, while the 3RV2021 series typically maxes out at smaller conductors. Verify the existing wiring and panel space before substitution.

MPN
3RV2142-4YA10