Skip to main content
Siemens 3RH1122-1KM40-0LA4 — Contactors

Siemens 3RH1122-1KM40-0LA4 SIRIUS Auxiliary Contactor, Size

MPN3RH1122-1KM40-0LA4

Siemens SIRIUS auxiliary contactor, order code 3RH1122-1KM40-0LA4, size S00, 10 A AC-12 rated, 4 NO + 2 NC contacts, 24 VDC coil with integrated varistor, screw and snap-on mounting, 72 mm depth.

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

3RH1122-1KM40-0LA4 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1KM40-0LA4 — 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
3RH1122-1KM40-0LA4 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-1KM40-0LA4 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1KM40-0LA4 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-1KM40-0LA4 — 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)
3RH1122-1KM40-0LA4 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1KM40-0LA4 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
3RH1122-1KM40-0LA4 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

It carries 4 normally-open and 2 normally-closed instantaneous contacts, plus a built-in varistor surge suppressor across the coil. Rated 10 A in AC-12 duty (resistive loads at up to 690 V), it handles the control-circuit currents typical of PLC outputs, relay coils, and indicator lamps. The 24 VDC coil draws 11 W on pickup and holds at 4 W.

Depth is 72 mm, which matters for shallow enclosures where a deeper contactor would crowd the door or busbar. That helps when panel layout forces an odd angle. Wire terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid — covers most control-circuit conductors without needing ferrules.

Shock resistance is 10g at 5 ms and 5g at 10 ms — enough for most machine-mounted panels but not for extreme vibration near presses or crushers.

This is a standard SIRIUS auxiliary contactor — a fast mover in panel-building and MRO.

Frequently asked questions

What is the depth of 3RH1122-1KM40-0LA4?

The depth is 72 mm, which fits standard S00-size enclosures without crowding the door.

What wire sizes does 3RH1122-1KM40-0LA4 accept?

The terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid conductors.

Will 3RH1122-1KM40-0LA4 drop into a panel built for 3RH2122-1BW40?

Both are S00-size auxiliary contactors with the same 45 mm width and screw/snap-on mount, so the physical fit is the same. The 3RH2122-1BW40 has a different contact configuration and coil voltage — verify those match your circuit before swapping.

How do I get pricing and availability for 3RH1122-1KM40-0LA4?

Submit an RFQ through the storefront. The part is sourced to order through independent distribution; current pricing and stock are confirmed at quote time.

What compliance documentation does Siemens provide for this contactor?

As a SIRIUS component, it carries CE marking for the European market and is designed to meet IEC/EN 60947 standards. Specific RoHS/REACH declarations are available from Siemens on request — the part includes a varistor, so check the material declaration if RoHS compliance for the suppressor is critical.

MPN
3RH1122-1KM40-0LA4