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Siemens 3RH1122-1BD40 — Contactors

Siemens 3RH1122-1BD40 SIRIUS Auxiliary Contactor, 10A AC-12,

MPN3RH1122-1BD40

Siemens SIRIUS auxiliary contactor, size S00, 3RH1122-1BD40, 42 V DC coil, 10 A AC-12 rated, 2 NO + 2 NC contacts, screw and snap-on mounting.

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

3RH1122-1BD40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1BD40 — 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
3RH1122-1BD40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-1BD40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1BD40 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-1BD40 — 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)
3RH1122-1BD40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1BD40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1122-1BD40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

Its 42 V DC coil pulls in at the rated voltage and holds at 3.2 W, typical for a 24–48 V DC control bus. The contact block carries 2 normally-open and 2 normally-closed instantaneous contacts, rated 10 A in AC-12 duty (resistive loads at up to 690 V). For DC switching, the 24 V rated current is 10 A, dropping to 1 A at 110 V and 0.27 A at 220 V — a curve that reflects the arc-quenching limits of a 4-contact block.

Terminal capacity accepts solid conductors up to 4 mm² or stranded with ferrule, covering typical control wiring from 0.5 to 2.5 mm². Front face is IP20 — safe for finger-probe access inside a closed panel.

Frequently asked questions

What is the rated switching current at 24 V DC for 3RH1122-1BD40?

At 24 V DC the contacts are rated 10 A. At 110 V DC it drops to 1 A, and at 220 V DC to 0.27 A — the DC derating curve is typical for a 4-pole contact block.

What are the key ratings and approvals for 3RH1122-1BD40?

AC-12 maximum operating current is 10 A. Surge voltage resistance is 6 kV. Pollution degree 3. The product is part of the Siemens SIRIUS family and is designed for use in industrial control panels per IEC/EN 60947.

Where can I buy 3RH1122-1BD40 and get current pricing?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm quote.

MPN
3RH1122-1BD40