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Siemens 3RH1122-2KF40-0LA0 — Contactors

Siemens 3RH1122-2KF40-0LA0 SIRIUS Auxiliary Contactor, 110 V

MPN3RH1122-2KF40-0LA0

Siemens SIRIUS auxiliary contactor, size S00, 3RH1122-2KF40-0LA0, 110 V DC coil with integrated varistor, 2 NO + 2 NC contacts, screw and snap-on mounting, IP20 front, depth 123 mm.

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

3RH1122-2KF40-0LA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-2KF40-0LA0 — 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
3RH1122-2KF40-0LA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-2KF40-0LA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-2KF40-0LA0 — 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
3RH1122-2KF40-0LA0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-2KF40-0LA0 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-2KF40-0LA0 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth123 mm

Product details

It carries 2 normally-open and 2 normally-closed instantaneous contacts, rated for switching at 110 V DC with a coil that draws 11 W on closing and 4 W holding.

The 45 mm width and 123 mm depth fit standard S00 panel layouts. Terminal capacity accepts 0.25 to 2.5 mm² solid or stranded wire — 2 conductors per clamp.

Contact reliability is rated at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — suitable for low-energy PLC or sensor signals. The AC-15 / DC-13 switching capacity varies by voltage: at 24 V the contacts switch 10 A, at 110 V they switch 1 A, at 230 V they switch 6 A, and at 400 V they switch 3 A. These ratings govern the actual load the contacts can break under inductive or resistive conditions.

Shock resistance is 10g for 5 ms and 5g for 10 ms. RoHS compliance date is July 1, 2006 — the part meets the original RoHS directive.

Frequently asked questions

What is the coil voltage for 3RH1122-2KF40-0LA0?

The coil is rated at 110 V DC, with an integrated varistor for surge suppression. Closing power draw is 11 W, holding power is 4 W.

Where can I buy 3RH1122-2KF40-0LA0?

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

What are the contact ratings for this auxiliary contactor?

The contacts are rated 10 A at 24 V, 1 A at 110 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. Contact reliability is one incorrect operation per 100 million cycles at 17 V, 1 mA.

Does 3RH1122-2KF40-0LA0 have the same footprint as 3RH2122-1BW40?

Both are S00 size auxiliary contactors with similar DIN-rail mounting, so they share the same 45 mm width and general panel footprint. However, verify coil voltage and contact configuration — the 3RH2122-1BW40 may differ in coil rating or contact arrangement. No direct drop-in guarantee without checking those specifics.

MPN
3RH1122-2KF40-0LA0