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Siemens 3RH2122-2AV00 — Contactors

Siemens 3RH2122-2AV00 SIRIUS Auxiliary Contactor, 2 NO, 10 A

MPN3RH2122-2AV00
Active

Siemens SIRIUS auxiliary contactor, size S00, 3RH2122-2AV00, 2 NO instantaneous contacts, rated 10 A at 24 V and 230 V, 400 V at 50 Hz, screw and snap-on mounting onto 35 mm DIN rail.

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

3RH2122-2AV00 — Identification
ParameterValue
Contactor frame sizeS00
3RH2122-2AV00 — 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 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2122-2AV00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz400 V
3RH2122-2AV00 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2122-2AV00 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail
3RH2122-2AV00 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2122-2AV00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2122-2AV00 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm
3RH2122-2AV00 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

The Siemens 3RH2122-2AV00 is a SIRIUS auxiliary contactor in size S00, carrying 2 normally-open instantaneous contacts. It switches control circuits in motor starter assemblies or signal interlocking — rated 10 A at both 24 V and 230 V, and 400 V at 50 Hz, so it handles typical 24 VDC control loops and 230 VAC pilot circuits without derating.

The S00 footprint (70 mm high, 45 mm wide, 73 mm deep) fits alongside S00 contactors in a compact control cabinet.

The 2 NO contacts are rated for 10 A at 24 V and 230 V — that's the continuous thermal current (Ith) at those voltages, meaning each contact can carry 10 A in resistive or lightly inductive control circuits. At 60 V the rating drops to 4.7 A, and at 400 V to 3 A; the curve reflects the arc-quenching limits at higher voltage.

Frequently asked questions

What are the key dimensions for panel layout?

The contactor measures 70 mm high, 45 mm wide, and 73 mm deep. It mounts on 35 mm DIN rail via screw or snap-on, and requires 10 mm clearance upward, downward, and forward, plus 6 mm at the sides.

What is the rated thermal current at different voltages?

The 2 NO contacts are rated 10 A at 24 V and 230 V, 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 2 A at 500 V, 0.5 A at 440 V, 0.26 A at 600 V, and 1 A at 690 V.

What compliance documentation is available?

The part carries a substance prohibitance date of 10/01/2009, indicating RoHS compliance. The SIRIUS series typically provides CE, UL, CSA, and IEC 60947 certifications; check the specific declaration for your jurisdiction.

MPN
3RH2122-2AV00