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Siemens 3RH1122-1BB40-ZW95 — Contactors

Siemens 3RH1122-1BB40-ZW95 SIRIUS Auxiliary Contactor, 24 V

MPN3RH1122-1BB40-ZW95

Siemens SIRIUS auxiliary contactor, 3RH1122-1BB40-ZW95, 24 V DC coil, 10 A rated, 2 NO contacts, size S00, 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

3RH1122-1BB40-ZW95 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1BB40-ZW95 — 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
3RH1122-1BB40-ZW95 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-1BB40-ZW95 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1BB40-ZW95 — 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
3RH1122-1BB40-ZW95 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1BB40-ZW95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-1BB40-ZW95 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

Size S00 footprint (45 mm wide, 57.5 mm tall, 72 mm deep) fits standard DIN-rail enclosures, secured by screw or snap-on mounting. The 24 V DC coil draws a constant 3.2 W closing and holding power, so no coil economizer is needed for continuous duty. Rated operational current reaches 10 A at 24 V and derates to 1 A at 690 V — match the voltage to the load's insulation class.

Two instantaneous NO contacts switch resistive or lightly inductive loads. Contact reliability is one incorrect switching per 100 million operations at 17 V, 1 mA.

Screw terminals accept solid conductors: two wires of 0.5…1.5 mm², two of 0.75…2.5 mm², or a single 4 mm² per clamp. AWG equivalents: 2x (20…16), 2x (18…14), 1x 12.

Frequently asked questions

What is 3RH1122-1BB40-ZW95 used for?

It is an auxiliary contactor that adds two NO contacts to a control circuit or switches pilot loads independently. Common in motor starter panels, conveyor controls, and safety circuits where extra signal contacts are needed.

MPN
3RH1122-1BB40-ZW95