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Siemens 3RV1331-4BC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1331-4BC10 SIRIUS Circuit Breaker, 20 A, 50 kA at

MPN3RV1331-4BC10

Siemens SIRIUS 3RV1331-4BC10 circuit breaker for starter combinations, 3-pole, 20 A, 50 kA breaking capacity at 400 V AC, screw terminals, DIN EN 50022 rail mount.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RV1331-4BC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1331-4BC10 — Electrical
ParameterValue
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated impulse withstand voltage (Uimp)6 000 V
Number of poles3
Power loss (AC, hot)14.5 W
Power loss, per pole (AC, hot)4.8 W
3RV1331-4BC10 — Protection & Tripping
ParameterValue
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)50 kA
Breaking capacity at 500 V (AC)12 kA
Breaking capacity at 690 V (AC)5 kA
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1331-4BC10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1331-4BC10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals with box terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (0.75 ... 16 mm²), 0.75 ... 25 mm²
Conductor range, AWG (main contacts)2x (18 ... 2), 1x (18 ... 2)
3RV1331-4BC10 — Mechanical
ParameterValue
Height140 mm
Width55 mm
Depth149 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting positionany
3RV1331-4BC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1331-4BC10 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

What this breaker does in the panel

Rated 20 A continuous and 7.5 kW motor power at 400 V, it handles the common 4-pole induction motor range up to that output. The 3-pole design suits three-phase motor loads. Screw-type terminals for main and control circuits accept solid 2x (0.75…16 mm²) or stranded up to 2x (0.75…25 mm²) and even 1x 35 mm². That's enough for the load wiring on a 20 A motor branch. Finger-safe touch protection means no shock hazard during inspection with the panel open.

Sourcing and lifecycle — a current-production spare

RoHS compliance date is July 1, 2006, which covers the EU directive. The design carries IP20 front protection — finger-safe but not washdown-rated, so keep it inside the enclosure. Shock rated at 25g / 11 ms, fine for most industrial floor environments.

The 3RV6021-4DA10 is a functionally similar SIRIUS circuit breaker but from a different series — typically the 3RV6 is a compact, higher-breaking variant for specific applications. The 3RV1331-4BC10 is the standard-duty choice for starter combinations at 20 A. If a panel was specified around the 3RV6021-4DA10, the 3RV1331-4BC10 will not drop in without checking the mounting footprint and terminal layout — the DIN rail clip is the same, but the depth (149 mm,) and width (55 mm,) may differ slightly. Best to verify the physical fit before swapping.

Frequently asked questions

What is the breaking capacity of this circuit breaker?

50 kA at 400 V AC, 100 kA at 240 V AC, 12 kA at 500 V AC, and 5 kA at 690 V AC. The 50 kA at 400 V is the rating that matters for most industrial 400 V distribution panels.

Where can I buy the 3RV1331-4BC10 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. No stock count or price is published here.

What wire sizes does the 3RV1331-4BC10 accept?

Solid conductors: 2x (0.75…16 mm²). Stranded: 2x (0.75…25 mm²) or 1x (0.75…35 mm²). Finely stranded with ferrule: 2x (0.75…16 mm²) or 0.75…25 mm². AWG equivalent: 2x (18…2) or 1x (18…2). Screw-type terminals with box terminals for the main circuit.

Will the 3RV1331-4BC10 fit a panel designed for the 3RV6021-4DA10?

Not without checking. Both are SIRIUS circuit breakers on 35 mm DIN rail, but the 3RV1331-4BC10 has a depth of 149 mm and width of 55 mm. The 3RV6021-4DA10 may have different dimensions. Verify the mounting footprint and terminal layout before substituting.

MPN
3RV1331-4BC10