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Siemens 3RH1122-1UB40-0KV0 — Contactors

Siemens 3RH1122-1UB40-0KV0 SIRIUS Auxiliary Contactor

MPN3RH1122-1UB40-0KV0

Siemens SIRIUS auxiliary contactor, 24 VDC coil, 2 NO instantaneous contacts, size S00, 45 mm width, IP20 front.

$34.79Ref. price · indicative, final on quote
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

3RH1122-1UB40-0KV0 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1UB40-0KV0 — Ratings & Performance
ParameterValue
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
3RH1122-1UB40-0KV0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-1UB40-0KV0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1UB40-0KV0 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-1UB40-0KV0 — 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)
3RH1122-1UB40-0KV0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1UB40-0KV0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1122-1UB40-0KV0 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

It carries 2 instantaneous normally-open contacts, each rated 10 A in AC-12 duty at 24 V. That AC-12 rating means the contacts are specified for resistive loads at control-circuit voltages — the typical use is switching PLC outputs, pilot lights, or solenoid valves inside a cabinet, not motor starting. The built-in varistor surge suppressor clips the inductive kickback from the coil when de-energized — no external flyback diode needed across the DC coil terminals. That saves a wiring step and keeps the panel layout cleaner.

Mounting and integration into a panel

Mounts by screw or snap-on onto a DIN rail. The size S00 footprint is 45 mm wide, 57.5 mm tall, 72 mm deep — it occupies a single 45 mm slot on the rail, leaving room for adjacent contactors or terminal blocks. That helps when fitting into a tight gland-plate area or a swing-frame panel. Wire terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm².

The contactor ships with the varistor integrated and the screw terminals ready for the wire sizes listed above.

Frequently asked questions

Is 3RH2122-1AC60 a valid cross-reference for 3RH1122-1UB40-0KV0?

The 3RH2122-1AC60 is a sibling in the same SIRIUS auxiliary contactor family, but it carries a different coil voltage and contact arrangement. Verify the coil voltage and contact count against your BOM before substituting — the 3RH1122-1UB40-0KV0 is the current-production part for a 24 VDC, 2 NO requirement.

MPN
3RH1122-1UB40-0KV0