Skip to main content
Log in
Siemens 3RV2031-4BB15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2031-4BB15 SIRIUS Motor Protection Circuit Breake

MPN3RV2031-4BB15
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2031-4BB15, CLASS 20, screw and snap-on mounting onto 35 mm DIN rail, 30 kA breaking capacity at 400 V.

Siemens 3RV2031-4BB15 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2031-4BB15 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS2
3RV2031-4BB15 — Electrical
ParameterValue
Rated operational current (Ie)20 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)14.5 W
Power loss, per pole (AC, hot)4.8 W
3RV2031-4BB15 — Protection & Tripping
ParameterValue
Overload release setting range14 ... 20 A
Instantaneous short-circuit trip current260 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)12 kA
Breaking capacity at 690 V (AC)5 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
3RV2031-4BB15 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)50 000
Endurance, auxiliary contacts (typ.)50 000
Switching frequency, AC-3 (max.)15 1/h
3RV2031-4BB15 — 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)
Conductor range, AWG (main contacts)2x (18 ... 3), 1x (18 ... 2)
3RV2031-4BB15 — Mechanical
ParameterValue
Height140 mm
Width55 mm
Depth149 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Mounting positionany
3RV2031-4BB15 — 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
3RV2031-4BB15 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Trip Class 20 means it allows a 20-second cold-start acceleration time before tripping — sized for standard induction motors driving pumps, fans, or conveyors that need a few seconds to spin up. Rated operating voltage spans 20 to 690 V AC, covering 400 V distribution common in industrial panels.

At 400 V the 3RV2031-4BB15 interrupts 30 kA; at 690 V that drops to 3 kA.

Width is 55 mm, depth 149 mm, height 140 mm — fits a standard 55 mm-wide slot on a DIN rail, leaving 10 mm clearance at the side and 50 mm above and below for airflow and wiring. Main contact terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire; M6 screw for the main contacts.

Frequently asked questions

What compliance documentation does Siemens provide for 3RV2031-4BB15?

The product carries the SIRIUS brand and is designed to IEC/EN standards for motor protection circuit breakers. Specific compliance documentation (RoHS, REACH, UL, IEC) is available from Siemens upon request or through the product documentation.

MPN
3RV2031-4BB15