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Siemens 3RH1122-2BC40 — Contactors

Siemens 3RH1122-2BC40 SIRIUS Auxiliary Contactor, 45mm, Scre

MPN3RH1122-2BC40

Siemens SIRIUS size S00 auxiliary contactor, 3RH1122-2BC40, 45 mm width, 73 mm depth, screw and snap-on mounting, IP20 front, current production.

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

3RH1122-2BC40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-2BC40 — 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
3RH1122-2BC40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-2BC40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-2BC40 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-2BC40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
3RH1122-2BC40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-2BC40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1122-2BC40 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

It carries two instantaneous normally open contacts and two normally closed contacts, rated for AC-12 switching up to 10 A at 24 V, with a 30 V DC coil rated at 3.2 W holding power.

Environmental and electrical ratings

Shock resistance is 10g for 5 ms and 5g for 10 ms — enough for most industrial cabinets but not for direct mounting on a vibrating machine base. Pollution degree 3 means it handles conductive dust and condensation typical in control rooms and light industrial environments. The coil draws 3.2 W DC both during pick-up and hold, so no inrush spike to stress the control transformer.

Frequently asked questions

Where can I buy the 3RH1122-2BC40?

It is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

Will the 3RH1122-2BC40 drop into a panel specified around the 3RH2122-1BW40?

Yes, both are SIRIUS size S00 auxiliary contactors with screw and snap-on mounting, so the footprint and DIN-rail clip are identical. Check that the coil voltage (24 V DC on this unit) and contact arrangement (2 NO + 2 NC) match your schematic before swapping.

What is the depth of the 3RH1122-2BC40?

The listed depth is 73 mm, measured from the mounting surface to the furthest projection.

What wire sizes does the 3RH1122-2BC40 accept?

Each terminal accepts two solid conductors from 0.25 mm² up to 2.5 mm².

MPN
3RH1122-2BC40