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Siemens 3RV2031-4RA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2031-4RA10 SIRIUS Circuit Breaker, CLASS 10, 77 A

MPN3RV2031-4RA10
Active

Siemens SIRIUS 3RV2031-4RA10 motor protection circuit breaker, CLASS 10, 77 A at 480 V, phase failure detection, screw terminals, DIN rail mounting.

$137.16Ref. price · indicative, final on quote
Siemens 3RV2031-4RA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2031-4RA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS2
3RV2031-4RA10 — Electrical
ParameterValue
Rated operational current (Ie)80 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)29.5 W
Power loss, per pole (AC, hot)9.8 W
3RV2031-4RA10 — Protection & Tripping
ParameterValue
Overload release setting range70 ... 80 A
Instantaneous short-circuit trip current1 040 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)65 kA
Breaking capacity at 400 V (AC)65 kA
Breaking capacity at 500 V (AC)8 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V65 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2031-4RA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)20 000
Endurance, auxiliary contacts (typ.)20 000
Switching frequency, AC-3 (max.)15 1/h
3RV2031-4RA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 35 mm²), 1x (1 ... 50 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 25 mm²), 1x (1 ... 35 mm²)
Conductor range, AWG (main contacts)2x (18 ... 2), 1x (18 ... 1)
3RV2031-4RA10 — Mechanical
ParameterValue
Height140 mm
Width55 mm
Depth149 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2031-4RA10 — 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
3RV2031-4RA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

What you need to know about this motor protection breaker

Check the trip curve before you land the load — CLASS 10 is standard for general-purpose motors; if you have a soft-start or high-inertia load, verify the curve matches your start time.

Mounting and wiring realities

Screw terminals for the main circuit accept 2x 1–35 mm² or 1x 1–50 mm² stranded. Torque down to M6 specs. Good for solid or stranded copper. That covers most indoor panel environments without derating.

Sourcing this order code

This Siemens order code is currently available through our supply chain. Submit an RFQ against your BOM line for lead time and pricing — we can source it to order.

Frequently asked questions

Does this breaker have phase failure protection?

Yes, phase failure detection is built in, so it will trip if one phase is lost, protecting the motor from single-phasing.

What trip class is this breaker?

CLASS 10, meaning it trips within 10 seconds at locked-rotor current. This is standard for most induction motor applications.

MPN
3RV2031-4RA10