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Siemens 3RV2031-4PB10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2031-4PB10 SIRIUS Motor Protection Circuit Breake

MPN3RV2031-4PB10
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2031-4PB10, Class 20 trip, 30 kA at 400 V, 55 mm wide, screw and snap-on DIN rail mounting.

$114.30Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2031-4PB10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS2
3RV2031-4PB10 — Electrical
ParameterValue
Rated operational current (Ie)36 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)20 W
Power loss, per pole (AC, hot)6.7 W
3RV2031-4PB10 — Protection & Tripping
ParameterValue
Overload release setting range28 ... 36 A
Instantaneous short-circuit trip current520 A
Trip classCLASS 20
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)65 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V100 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
3RV2031-4PB10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)50 000
Endurance, auxiliary contacts (typ.)50 000
Switching frequency, AC-3 (max.)15 1/h
3RV2031-4PB10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 25 mm²), 1x (1 ... 35 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 16 mm²), 1x (1 ... 25 mm²)
Conductor range, AWG (main contacts)2x (18 ... 3), 1x (18 ... 2)
3RV2031-4PB10 — 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
3RV2031-4PB10 — 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
3RV2031-4PB10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Trip Class 20 means it allows a 20-second cold-start lock-rotor current before tripping — standard for general-purpose conveyors, pumps, and fans that don't need the fast reaction of Class 10. Ground fault detection is not included — that's handled separately by a GFCI or RCD upstream.

Mounts in any position. Screw-type terminals on the main circuit accept 2x 1–25 mm² or 1x 1–35 mm² solid/stranded — M6 for the main contacts. At 240 V no side clearance is required.

Short-circuit breaking capacity varies by voltage: 100 kA at 240 V, 30 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. At 480 V it's rated 36 A continuous; at 600 V also 36 A. This lets you coordinate with upstream MCCBs or fuses for selective tripping on most 480 V industrial panels. Maximum switching frequency in AC-3 duty is 15 operations per hour — fine for occasional start/stop cycles, not for high-duty jogging or reversing applications.

Frequently asked questions

What is the breaking capacity of 3RV2031-4PB10 at 400 V?

30 kA at 400 V, which covers the majority of industrial fault levels for motor branch circuits.

What trip class is 3RV2031-4PB10?

Trip Class 20 — allows 20 seconds of locked-rotor current before tripping, suitable for standard motor starting profiles.

Does 3RV2031-4PB10 detect phase failure?

Yes, phase failure detection is built in. Ground fault detection is not included.

Where can I buy 3RV2031-4PB10?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RV2031-4PB10