Skip to main content
Siemens 3RH1122-2KV40-1AA0 — Contactors

Siemens 3RH1122-2KV40-1AA0 SIRIUS Auxiliary Contactor, S00,

MPN3RH1122-2KV40-1AA0

Siemens SIRIUS auxiliary contactor, size S00, 36 VDC coil with integrated varistor, 2 NO + 2 NC contacts, screw and snap-on mounting, IP20 front.

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

3RH1122-2KV40-1AA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-2KV40-1AA0 — 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
3RH1122-2KV40-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-2KV40-1AA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-2KV40-1AA0 — 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
3RH1122-2KV40-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RH1122-2KV40-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-2KV40-1AA0 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

It carries 2 normally-open and 2 normally-closed instantaneous contacts, with no make-before-break or delayed switching elements. The coil is rated 36 VDC with an integrated varistor surge suppressor, drawing 11 W during pickup and 4 W holding. This built-in suppression means you don't need an external flyback diode or RC snubber across the coil — the varistor handles the inductive kick, which simplifies panel wiring and reduces component count.

Switching capacity and contact reliability

The auxiliary contacts are rated for switching at multiple voltage levels: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are the thermal continuous current ratings at each voltage — the actual making/breaking capacity for inductive loads will be lower, so size the contacts to the inrush of whatever pilot device (relay, PLC input, solenoid valve) they drive.

Terminals accept 2x solid conductors from 0.25 to 2.5 mm².

Shock resistance is 10g for 5 ms and 5g for 10 ms — sufficient for most industrial machinery but not for extreme vibration environments like crushers or off-road vehicles. The substance prohibitance date of 07/01/2006 aligns with RoHS compliance. The coil's closing power of 11 W and holding power of 4 W are within the range a typical 36 VDC power supply can handle — just check the supply's inrush rating if multiple contactors pick up simultaneously.

Frequently asked questions

What is the difference between this 3RH1122 and the 3RT1015 contactor series?

The 3RH1122-2KV40-1AA0 is a dedicated auxiliary contactor (pilot duty) with 2 NO + 2 NC contacts, while the 3RT1015 series are main power contactors for switching motor loads. The 3RT1015-1BB42, for example, is a 3-pole power contactor with a different coil voltage and no built-in auxiliary contacts — it requires a separate 3RH1 auxiliary contact block if you need extra signal contacts. They share the same S00 frame size and DIN-rail mounting, so they can sit side by side in a panel, but they are not drop-in replacements for each other.

What compliance documentation is available for this part?

The substance prohibitance date of 07/01/2006 indicates RoHS compliance. The part carries a surge voltage resistance of 6 kV and pollution degree 3 rating, which are IEC 60947-1 parameters. For specific declarations (REACH, UL, CE), request the manufacturer's compliance documentation with your RFQ.

MPN
3RH1122-2KV40-1AA0