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Siemens 3RH1122-1MB40-0KT0 — Contactors

Siemens SIRIUS 3RH1122-1MB40-0KT0 Coupling Relay, 24 VDC, 10

MPN3RH1122-1MB40-0KT0

Siemens SIRIUS coupling relay, 3RH1122-1MB40-0KT0, 24 VDC coil, 2 NO contacts, 10 A rated current, S00 frame size, screw and snap-on mounting.

$119.33Ref. 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

3RH1122-1MB40-0KT0 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1MB40-0KT0 — 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
3RH1122-1MB40-0KT0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1122-1MB40-0KT0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1MB40-0KT0 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-1MB40-0KT0 — 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)
3RH1122-1MB40-0KT0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RH1122-1MB40-0KT0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1122-1MB40-0KT0 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

The Siemens SIRIUS 3RH1122-1MB40-0KT0 is a coupling relay for switching auxiliary circuits, built on the S00 contactor frame.

Coil and switching thresholds

Coil is 24 VDC, pickup at 85% of rated (20.4 V), dropout at 15% (3.6 V). Closing and holding power are both 1.4 W DC — no AC coil inrush to budget for, but the DC coil holds steady draw so verify your 24 V supply can source that continuously per relay.

Screw and snap-on mounting onto DIN rail. The 45 mm wide, 57.5 mm tall, 72 mm deep envelope matches the SIRIUS S00 contactor family — drops into existing panels without re-drilling. IP20 on the front face — finger-safe but not washdown-rated.

Shock resistance 10g at 5 ms and 5g at 10 ms. Surge voltage resistance 6 kV.

Frequently asked questions

Will 3RH1122-1MB40-0KT0 drop into a panel specified for 3RH2122-1WB40?

Both parts share the S00 frame size and the same 45 mm width, so the mechanical footprint and DIN-rail mounting are identical. The electrical swap depends on coil voltage and contact arrangement — confirm those match your circuit.

MPN
3RH1122-1MB40-0KT0