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Siemens 3RH1344-1DE40-0KA0 — Contactors

Siemens 3RH1344-1DE40-0KA0 SIRIUS Auxiliary Contactor, 4 NO,

MPN3RH1344-1DE40-0KA0

Siemens SIRIUS auxiliary contactor, 3RH1344-1DE40-0KA0, size S00, 4 NO instantaneous contacts, 24 VDC coil with integrated varistor, screw and snap-on mounting, IP20 front.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH1344-1DE40-0KA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH1344-1DE40-0KA0 — 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
3RH1344-1DE40-0KA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1344-1DE40-0KA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1344-1DE40-0KA0 — 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
3RH1344-1DE40-0KA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH1344-1DE40-0KA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1344-1DE40-0KA0 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth111 mm

Product details

It provides four normally open instantaneous contacts rated for 10 A at 24 V, with a 24 VDC coil that draws 3.2 W for both closing and holding. The integrated varistor surge suppressor handles coil transients internally, so no external suppression is needed on the control side.

The four NO contacts are rated for switching across a range of control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. At 110 V the rating drops to 1 A, and at 220 V it's 0.27 A.

Wire termination specs

Terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², and 2x 4 mm². This covers standard control wiring in panel builds — no special ferrules or crimp tools required beyond what's typical for a 45 mm-wide contactor.

Frequently asked questions

What compliance documentation is available for this part?

The part carries a substance prohibitance date of July 1, 2006, indicating RoHS compliance. It is a Siemens SIRIUS product with standard CE marking for the European market.

What is the depth of this auxiliary contactor?

The depth is 111 mm, with a width of 45 mm and height of 57.5 mm, fitting the S00 contactor frame size.

What wire sizes does the terminal accept?

The terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², and 2x 4 mm².

MPN
3RH1344-1DE40-0KA0