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Siemens 3RH1131-2BD40 — Contactors

Siemens 3RH1131-2BD40 SIRIUS Auxiliary Contactor, 42 V DC, 3

MPN3RH1131-2BD40

Siemens SIRIUS auxiliary contactor, size S00, 42 V DC coil, 3 NO instantaneous contacts, screw and snap-on mounting, IP20 front, 73 mm depth.

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

3RH1131-2BD40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1131-2BD40 — 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
3RH1131-2BD40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1131-2BD40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1131-2BD40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting
3RH1131-2BD40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1131-2BD40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1131-2BD40 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

Its 42 V DC coil draws 3.2 W during both pick-up and hold, so the coil-supply transformer or PLC output must be sized for that continuous load. Three normally-open instantaneous contacts handle the switching; there are no delayed, leading, lagging, or make-before-break contacts on this variant.

Switching capacity by voltage — what the ratings mean

The contact ratings are given at specific operating voltages, not as a single blanket current. At 24 V it carries 10 A; at 110 V it drops to 1 A; at 230 V it handles 6 A; at 400 V it is rated 3 A; at 500 V it is 2 A; and at 690 V it is 1 A. The 230 V and 400 V figures are the ones most often checked in European panel designs — 6 A at 230 V covers most pilot-duty and signal-lamp loads, while 3 A at 400 V is enough for small contactor coils or indicator circuits in a 400 V line. The 690 V rating (1 A) confirms it can be used in 690 V control circuits, but the current is low enough that you should verify the inrush of the downstream device.

Mounting is by screw or snap-on onto a DIN rail. The screw terminals accept 2x (0.25 … 2.5 mm²) solid or 2x (24 … 14 AWG) stranded — strip length and ferrule size should follow the standard 8 mm practice for this terminal class.

Shock resistance is 10g / 5 ms and 5g / 10 ms — adequate for most industrial machinery but not for high-g mobile or marine applications without additional damping.

Frequently asked questions

Where can I buy 3RH1131-2BD40 and get a price?

This part is sourced and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit a request for quotation through the storefront.

What is the depth of 3RH1131-2BD40?

The depth is 73 mm, with a width of 45 mm and height of 60 mm — the S00 frame size fits in the same DIN-rail footprint as the smallest SIRIUS contactors.

What wire sizes does 3RH1131-2BD40 accept?

The screw terminals accept 2x (0.25 … 2.5 mm²) solid or 2x (24 … 14 AWG) stranded copper.

Will 3RH1131-2BD40 drop into a panel specified around 3RH2122-1BW40?

Both are SIRIUS auxiliary contactors in size S00 with the same mounting footprint and terminal spacing, so the mechanical fit is identical. The difference is the contact configuration: 3RH1131-2BD40 has 3 NO + 0 NC, while 3RH2122-1BW40 has 2 NO + 2 NC. If your circuit needs the extra NC, this part will not match without rewiring.

What compliance documentation does Siemens provide for 3RH1131-2BD40?

The part is RoHS-compliant per the July 1, 2006 date. It carries IP20 front protection and pollution degree 3 rating. Standard Siemens declarations of conformity (CE, UKCA) are available on request.

MPN
3RH1131-2BD40