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Siemens 3RH1140-2WB40 — Contactors

Siemens 3RH1140-2WB40 SIRIUS Auxiliary Contactor, 24 VDC, 4

MPN3RH1140-2WB40

Siemens SIRIUS auxiliary contactor, size S00, 24 VDC coil, 4 NO instantaneous contacts, screw and snap-on mounting, IP20 front, with varistor surge suppression.

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

3RH1140-2WB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1140-2WB40 — 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
3RH1140-2WB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1140-2WB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1140-2WB40 — 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
3RH1140-2WB40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RH1140-2WB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1140-2WB40 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

It carries four normally-open instantaneous contacts rated for a range of voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. The 24 VDC coil draws 1.4 W both during pickup and hold, with a pickup threshold of 0.85 x rated voltage and a dropout threshold of 0.15 x rated voltage. A built-in varistor suppresses coil surge transients.

The 45 mm wide, 60 mm tall, 73 mm deep footprint fits standard S00 panel layouts.

Environmental and endurance ratings

Rated for pollution degree 3 (conductive or dry non-conductive pollution). Shock resistance is 10g / 5 ms and 5g / 10 ms. Mechanical life is typical 30 million operations.

Frequently asked questions

What is the closest functional second-source for 3RH1140-2WB40?

The 3RH2122-1WB40 is a SIRIUS auxiliary contactor in the same S00 frame but carries 2 NO + 2 NC contacts instead of 4 NO. It shares the same 24 VDC coil voltage, screw/snap-on mounting, and IP20 front. Panel fit is the same 45 mm width, so it drops into the same DIN-rail slot without rewiring the coil supply, but the contact configuration differs — verify your circuit's NC requirements before substituting.

What compliance documentation does Siemens provide for 3RH1140-2WB40?

The part carries a RoHS compliance date of 07/01/2006. The SIRIUS series typically supports IEC 60947-5-1 for contactor relays and UL/CSA listings; confirm specific certification markings on the nameplate for your jurisdiction.

How do I get current pricing and availability for 3RH1140-2WB40?

Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time.

MPN
3RH1140-2WB40