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Siemens 3RH1122-1AK20 — Contactors

Siemens 3RH1122-1AK20 SIRIUS Auxiliary Contactor, 2 NO, S00,

MPN3RH1122-1AK20

Siemens SIRIUS auxiliary contactor, 3RH1122-1AK20, size S00, 2 NO instantaneous contacts, screw and snap-on mounting, IP20 front, 6 kV surge voltage resistance.

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

3RH1122-1AK20 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1AK20 — 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
3RH1122-1AK20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz120 V
3RH1122-1AK20 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1AK20 — 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)
Mounting methodscrew and snap-on mounting
3RH1122-1AK20 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1AK20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-1AK20 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

It carries two normally-open instantaneous contacts (2 NO) and no NC, delayed, or make-before-break switching — the contact complement is fixed at delivery.

The contactor's switching capacity varies with voltage and duty. At 24 V rated value it handles 10 A; at 230 V rated value, 6 A; at 400 V rated value, 3 A; and at 690 V rated value, 1 A. These are the maximum continuous currents the contacts can make and break at those voltages — derate further for inductive loads like relay coils or solenoid valves. Mechanical endurance is 30 million operations typical, which outlasts most panel lifecycles.

Fastening is by screw and snap-on mounting onto standard DIN rail. The S00 footprint is 45 mm wide, 57.5 mm high, 72 mm deep — fits the standard S00 slot in a SIRIUS motor starter assembly. Terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². That covers most control wiring from signal-level to 4 mm² power feeds. Shock resistance is 10g / 5 ms and 5g / 10 ms — adequate for panel-mounted equipment in conveyor or machine-tool applications.

Frequently asked questions

What is 3RH1122-1AK20's listed depth?

The depth is 72 mm. Combined with the 45 mm width and 57.5 mm height, it occupies the standard S00 footprint.

Will 3RH1122-1AK20 drop into a panel specified around 3RH2122-2AV00 without rewiring?

Both are S00-size SIRIUS auxiliary contactors with the same 45 mm width and DIN-rail snap-on mounting, so the mechanical fit is identical. However, the 3RH1122-1AK20 carries 2 NO contacts only, while the 3RH2122-2AV00 has a different contact configuration — verify your circuit's NC and delayed-switching requirements before substituting.

MPN
3RH1122-1AK20