BOM / RFQ

Siemens 3RV1431-4BA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1431-4BA10 SIRIUS Circuit Breaker, Transformer Pr

MPN3RV1431-4BA10

Siemens SIRIUS, circuit breaker for transformer protection, 3RV1431-4BA10, 20 A continuous, Class 10 trip, 100 kA breaking at 240 V AC, screw terminals, IP20 front.

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

Specifications

3RV1431-4BA10 — Identification
Parameter	Value
Series	SIRIUS
Product designation	circuit breaker

3RV1431-4BA10 — Electrical
Parameter	Value
Rated voltage	690 V
Rated voltage, AC-3 (max.)	690 V
Rated impulse withstand voltage (Uimp)	6 000 V
Number of poles	3
Power loss (AC, hot)	14.5 W
Power loss, per pole (AC, hot)	4.8 W

3RV1431-4BA10 — Protection & Tripping
Parameter	Value
Overload release setting range	14 ... 20 A
Trip class	CLASS 10
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 detection	Yes
Ground-fault detection	No
Auxiliary switch extendable	Yes

3RV1431-4BA10 — Endurance & Switching
Parameter	Value
Auxiliary CO (changeover) contacts	0

3RV1431-4BA10 — Connections
Parameter	Value
Main-circuit terminal type	screw-type terminals with box terminals
Main-circuit connector arrangement	front side
Conductor cross-section, finely stranded with ferrule	2x (0.75 ... 16 mm²), 0.75 ... 25 mm²
Conductor range, AWG (main contacts)	2x (18 ... 2), 1x (18 ... 2)

3RV1431-4BA10 — Mechanical
Parameter	Value
Height	140 mm
Width	55 mm
Depth	149 mm
Mounting method	screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting position	any

3RV1431-4BA10 — Environmental
Parameter	Value
Operating temperature	-20 ... +60 °C
Storage temperature	-50 ... +80 °C
Transport temperature	-50 ... +80 °C
Max. installation altitude	2 000 m

3RV1431-4BA10 — Specifications
Parameter	Value
Design Of The Product	for transformer protection

Product details

Breaking capacity is 100 kA at 240 V AC, 50 kA at 400 V AC, 12 kA at 500 V AC, and 5 kA at 690 V AC — so on a 400 V supply it clears a 50 kA prospective fault without upstream fuses needing to coordinate.

Main circuit terminals accept solid 2x (0.75…16 mm²) or stranded 2x (0.75…25 mm²) with a single conductor up to 35 mm² — enough for the 20 A feed without a separate terminal block.

For a BOM line that needs a transformer-protection breaker at 20 A, Class 10, with 50 kA breaking at 400 V, the 3RV1431-4BA10 is the current-production choice — no need to stockpile or search surplus.