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Siemens 3RH1122-2FB40 — Contactors

Siemens 3RH1122-2FB40 SIRIUS Auxiliary Contactor, 24 V DC, 1

MPN3RH1122-2FB40

Siemens SIRIUS auxiliary contactor, 3RH1122-2FB40, size S00, 24 V DC coil, 2 NO + 2 NC contacts, screw/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

3RH1122-2FB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-2FB40 — 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
3RH1122-2FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-2FB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-2FB40 — 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
3RH1122-2FB40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-2FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1122-2FB40 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

Auxiliary contactor for control and signal switching

Coil and contact ratings for real-world loads

The DC coil is rated 24 V nominal with a built-in free-wheeling diode surge suppressor — no external snubber needed on the coil drive. Contact ratings drop as voltage climbs: 10 A at 24 V, 6 A at 230 V AC, 3 A at 400 V, 1 A at 690 V. The 6 kV surge voltage resistance (rated impulse withstand) means it handles typical industrial transient events without flashover.

Mounts on DIN rail via the screw-and-snap-on mechanism — no tools for the snap, but the screw secures it against vibration.

MPN
3RH1122-2FB40