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Siemens 3RV2031-4XB15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2031-4XB15 SIRIUS Motor Protection Circuit Breake

MPN3RV2031-4XB15
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2031-4XB15, CLASS 20, 30 kA at 400 V, 55 mm width, screw and snap-on 35 mm DIN rail mounting.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RV2031-4XB15 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS2
3RV2031-4XB15 — Electrical
ParameterValue
Rated operational current (Ie)59 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)26 W
Power loss, per pole (AC, hot)8.7 W
3RV2031-4XB15 — Protection & Tripping
ParameterValue
Overload release setting range49 ... 59 A
Instantaneous short-circuit trip current845 A
Trip classCLASS 20
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 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
3RV2031-4XB15 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)20 000
Endurance, auxiliary contacts (typ.)20 000
Switching frequency, AC-3 (max.)15 1/h
3RV2031-4XB15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
3RV2031-4XB15 — 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
3RV2031-4XB15 — 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
3RV2031-4XB15 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated operating voltage spans 20 to 690 V, and the breaker carries a CLASS 20 trip characteristic — meaning it allows a 20-second overload before tripping, which matches standard NEMA and IEC motor starting profiles for medium-inertia loads like pumps and compressors. Breaking capacity at 400 V is 30 kA, sufficient for most industrial distribution panels with typical transformer sizes up to 1.6 MVA; at 690 V it still interrupts 2 kA, covering high-voltage motor circuits in European 690 V networks.

Width is 55 mm, depth 149 mm, height 140 mm. The 55 mm width occupies three standard 18 mm DIN-rail module spaces, so plan for three slots in your enclosure layout.

Frequently asked questions

What is the breaking capacity of 3RV2031-4XB15 at 400 V?

The breaking capacity at 400 V rated value is 30 kA, which covers most industrial distribution panels up to 1.6 MVA transformer capacity.

Will 3RV2031-4XB15 drop into a panel specified around 3RV2021-4NA25 without rewiring?

The 3RV2031-4XB15 is 55 mm wide versus the 3RV2021-4NA25's 45 mm width, so it will not fit the same DIN-rail slot without moving adjacent devices. Terminal sizes and screw torque specs differ — verify the main contact terminal accepts M6 ring lugs (the 3RV2031-4XB15 uses M6 for main contacts).

Where can I buy 3RV2031-4XB15 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment.

MPN
3RV2031-4XB15