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Siemens 3RH1431-1BM40 — Contactors

Siemens 3RH1431-1BM40 SIRIUS Auxiliary Contactor, 10 A AC-12

MPN3RH1431-1BM40

Siemens SIRIUS auxiliary contactor, size S00, 3 NO + 1 NC, 10 A AC-12, 220 V DC coil, screw and snap-on mounting, IP20 front, 90 x 57.5 x 72 mm.

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

3RH1431-1BM40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1431-1BM40 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 110 V1 A
Rated value @ 220 V0.27 A
3RH1431-1BM40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1431-1BM40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1431-1BM40 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1431-1BM40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
3RH1431-1BM40 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH1431-1BM40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1431-1BM40 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth72 mm

Product details

Auxiliary contactor for control-circuit switching

It carries 3 instantaneous normally-open contacts and 1 normally-closed contact, rated 10 A at AC-12 (resistive control-circuit duty) and 10 A at 24 V DC. The DC coil pulls 3.2 W to close and holds at 3.2 W — no AC hum, no power drop after pick-up. The 90 mm width, 57.5 mm height, and 72 mm depth fit the S00 footprint — zero side clearance needed, so you can gang them tight in a panel.

Contact ratings across the voltage range

The contacts are rated for switching at multiple control voltages: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At 110 V the rating is 1 A, and at 220 V it's 0.27 A. These are the thermal current limits for the contact set — match your control-circuit voltage to the appropriate row to avoid overstressing the contacts. Mechanical endurance is rated at 5 000 000 cycles typical for the contactor size. Shock resistance is 10g / 5 ms and 5g / 10 ms, and the operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.

Wiring and mounting flexibility

Terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².

Frequently asked questions

How do I get current pricing and availability for 3RH1431-1BM40?

Submit an RFQ through the storefront. The part is sourced to order; pricing and stock are confirmed at quote time.

What is the closest functional second-source to 3RH1431-1BM40?

The 3RH2140-1BP40 is a similar SIRIUS auxiliary contactor but with a different contact configuration and coil voltage — verify the contact arrangement and coil rating before substituting.

What is the depth of 3RH1431-1BM40?

The depth is 72 mm.

What wire sizes does 3RH1431-1BM40 accept?

It accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm².

Will 3RH1431-1BM40 drop into a panel specified around 3RH2140-1BP40 without rewiring?

Both are SIRIUS size S00 with the same mounting footprint and terminal spacing, so mechanical fit is the same. However, verify the coil voltage and contact configuration — the 3RH1431-1BM40 uses a 220 V DC coil and 3 NO + 1 NC contacts, which may differ from the 3RH2140-1BP40.

MPN
3RH1431-1BM40