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Siemens 3RH2122-1VB40-ZW97 — Contactors

Siemens 3RH2122-1VB40-ZW97 SIRIUS Coupling Relay, 24 V DC

MPN3RH2122-1VB40-ZW97
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Siemens SIRIUS 3RH2122-1VB40-ZW97 coupling relay for switching auxiliary circuits, S00 size, 24 V DC coil, 2 NO instantaneous contacts, 10 A at 24 V, screw and snap-on 35 mm DIN rail mounting, 45 x 57.5 x 73 mm (W x H x D).

Siemens 3RH2122-1VB40-ZW97 datasheet (PDF)
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RH2122-1VB40-ZW97 — Identification
ParameterValue
Contactor frame sizeS00

Ratings & Performance

3RH2122-1VB40-ZW97 — 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

Control & Coil

3RH2122-1VB40-ZW97 — Control & Coil
ParameterValue
Control supply voltage typeDC

Contacts & Poles

3RH2122-1VB40-ZW97 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)

Connection & Mounting

3RH2122-1VB40-ZW97 — 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 standard mounting rail

Durability

3RH2122-1VB40-ZW97 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000

Environmental

3RH2122-1VB40-ZW97 — Environmental
ParameterValue
Operating temperature range-25 ... +50 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m

Mechanical

3RH2122-1VB40-ZW97 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm

Specifications

3RH2122-1VB40-ZW97 — Specifications
ParameterValue
At AC10 000 1/h

Product details

S00 coupling relay, 24 V DC coil, 2 NO — panel-fit and switching specs

The Siemens 3RH2122-1VB40-ZW97 is a SIRIUS coupling relay for switching auxiliary circuits, built in the S00 contactor footprint.

DIN-rail mounting and clearance — S00 size, 45 mm wide

This allows dense packing in a control cabinet while keeping arc-flash and cooling clearance for the auxiliary contacts.

Switching capacity across voltages — DC and AC auxiliary loads

Rated operational current varies with voltage and load type. For AC loads at 230 V it handles 10 A; at 400 V 3 A; at 500 V 2 A; at 690 V 1 A. Mechanical switching frequency at AC is 10,000 operations per hour, so it can keep pace with fast-cycling machinery without overheating the coil.

MPN
3RH2122-1VB40-ZW97