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Siemens 3RH2122-1BW40-0AA6 — Contactors

Siemens 3RH2122-1BW40-0AA6 SIRIUS Auxiliary Contactor, 2 NO,

MPN3RH2122-1BW40-0AA6

Siemens SIRIUS, auxiliary contactor, size S00, 2 NO instantaneous contacts, 48 VDC coil, screw and snap-on mounting onto 35 mm DIN rail, 73 mm depth, 45 mm width, 57.5 mm height.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH2122-1BW40-0AA6 — Identification
ParameterValue
Contactor frame sizeS00
3RH2122-1BW40-0AA6 — 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
3RH2122-1BW40-0AA6 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2122-1BW40-0AA6 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2122-1BW40-0AA6 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (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 onto 35 mm DIN rail
3RH2122-1BW40-0AA6 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2122-1BW40-0AA6 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2122-1BW40-0AA6 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2122-1BW40-0AA6 — Specifications
ParameterValue
At AC10 000 1/h

Product details

Auxiliary contactor for SIRIUS S00 contactor systems

The Siemens 3RH2122-1BW40-0AA6 is a SIRIUS auxiliary contactor in size S00, carrying 2 normally-open instantaneous contacts. The coil is rated for 48 VDC with a closing and holding power of 4 W.

Switching capacity and contact ratings

The instantaneous contacts are rated for 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, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V.

Accepts 2 conductors per terminal: 0.5 to 1.5 mm², 0.75 to 2.5 mm², or 2x 4 mm² solid or stranded.

Frequently asked questions

Will 3RH2122-1BW40-0AA6 drop into a panel specified for 3RH2122-1BW40 without rewiring?

The base order code 3RH2122-1BW40 shares the same size S00, 2 NO contacts, 48 VDC coil, and DIN rail mounting. The -0AA6 suffix typically indicates a standard packaging variant, so the form, fit, and function should be identical. Verify the terminal markings and coil voltage on the existing panel tag before installation.

What compliance documentation does Siemens provide for 3RH2122-1BW40-0AA6?

The part carries a RoHS substance prohibition date of 10/01/2009. Siemens typically provides a CE declaration of conformity and a UL/CSA file for the SIRIUS series. Request the specific compliance package with your RFQ.

MPN
3RH2122-1BW40-0AA6