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Siemens 3RH1431-1BF40 — Contactors

Siemens SIRIUS 3RH1431-1BF40 Auxiliary Contactor, 110 VDC Co

MPN3RH1431-1BF40

Siemens SIRIUS auxiliary contactor, 3RH1431-1BF40, 110 VDC coil, 3 NO + 1 NC contacts, size S00, screw and snap-on mounting.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH1431-1BF40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1431-1BF40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
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
3RH1431-1BF40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1431-1BF40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1431-1BF40 — 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)
Mounting methodscrew and snap-on mounting
3RH1431-1BF40 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH1431-1BF40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1431-1BF40 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth72 mm

Product details

It carries 3 normally open and 1 normally closed instantaneous contacts, with a 110 VDC coil. Sized to the S00 frame, it mates directly with S00 contactors like the 3RT1 series for a compact, ganged assembly on a DIN rail or screw panel.

The coil pulls in at 110 VDC, consuming 3.2 W both during pick-up and hold — no economizer circuit needed. The contacts are rated for switching at different voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. These are the maximum continuous currents the contacts can make and break under resistive (AC-1) duty. For motor or inductive loads, derate per the AC-15 utilization category typical for auxiliary contacts.

Wire terminals accept solid conductors: 2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm².

Frequently asked questions

What is the depth of this auxiliary contactor?

The depth is 72 mm.

What wire sizes does it accept?

Solid conductors: 2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm².

Will the 3RH1431-1BF40 drop into a panel designed for the 3RH2422-1AB00?

Both are S00 frame auxiliary contactors with screw/snap-on mounting, so the footprint and DIN-rail clip pattern are the same. The main difference is the contact configuration: 3RH1431-1BF40 has 3 NO + 1 NC, while the 3RH2422-1AB00 has a different arrangement. Verify your circuit's NO/NC count before swapping.

MPN
3RH1431-1BF40