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Siemens 3RH1122-2BV40 — Contactors

Siemens 3RH1122-2BV40 SIRIUS Auxiliary Contactor, 36 V DC, 1

MPN3RH1122-2BV40

Siemens SIRIUS auxiliary contactor, size S00, 36 V DC coil, 10 A at 24 V, 2 NO + 2 NC, screw/snap-on mounting, IP20 front, current lifecycle.

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

3RH1122-2BV40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-2BV40 — 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
3RH1122-2BV40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-2BV40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-2BV40 — 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
3RH1122-2BV40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-2BV40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-2BV40 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

The 36 V DC coil draws 3.2 W for both closing and holding, so the power supply budget is flat — no inrush spike to size around. Rated 10 A at 24 V for resistive loads, with a surge voltage withstand of 6 kV (pollution degree 3), it handles the dirty electrical environment you get in a mixed panel with drives and contactors.

The 45 mm width and 73 mm depth fit the standard S00 footprint — no surprises on the gland plate. Terminal accepts 2x (0.25... 2.5 mm²) solid or 2x (24... 14) AWG stranded. Mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so you can fit it into tight corners or angled subpanels without derating.

Contact configuration and switching reliability

Carries 2 instantaneous NO contacts and 2 NC contacts — no delayed, lagging, or make-before-break options on this variant. The contact reliability spec is one incorrect switching per 100 million operations at 17 V, 1 mA, which matters when you're switching PLC-level signals where dry contacts can oxidize.

Frequently asked questions

What is the closest functional second-source for 3RH1122-2BV40?

The 3RH2122-1BW40 is a peer in the same SIRIUS auxiliary contactor family. The 3RH1122-2BV40 uses a 36 V DC coil; the 3RH2122-1BW40 uses a different coil voltage. Verify coil compatibility before substituting — the footprint and contact arrangement are similar, but the coil draw may differ.

Will 3RH1122-2BV40 drop into a panel specified around 3RH2122-1BW40 without rewiring?

Both are size S00 with the same 45 mm width and screw/snap-on mounting, so the mechanical footprint matches. The terminal capacity is identical (2x 0.25–2.5 mm² solid). The difference is the coil voltage — 36 V DC on this part versus whatever the 3RH2122-1BW40 carries. If the panel's control voltage is 36 V DC, it drops in without rewiring; if not, the coil won't pull in.

What compliance documentation does this brand provide for 3RH1122-2BV40?

The part carries a RoHS compliance date of 07/01/2006. It is a Siemens SIRIUS product; standard documentation includes the CE declaration of conformity and the manufacturer's RoHS declaration. REACH and UKCA documentation may not be included on older stock — request the declaration pack at quote time if your QA requires it.

Where can I buy 3RH1122-2BV40?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here.

MPN
3RH1122-2BV40