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Siemens 3RH1344-2DB40-0KA0-ZW97 — Contactors

Siemens 3RH1344-2DB40-0KA0-ZW97 SIRIUS Auxiliary Contactor,

MPN3RH1344-2DB40-0KA0-ZW97

Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil, 4 NO instantaneous contacts, 10 A rated current, screw and snap-on mounting, IP20 front, with varistor surge suppression.

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

3RH1344-2DB40-0KA0-ZW97 — Identification
ParameterValue
Contactor frame sizeS00
3RH1344-2DB40-0KA0-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 V6 A
Rated value @ 24 V10 A
Rated value @ 110 V1 A
Rated value @ 220 V0.27 A
3RH1344-2DB40-0KA0-ZW97 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1344-2DB40-0KA0-ZW97 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1344-2DB40-0KA0-ZW97 — 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
3RH1344-2DB40-0KA0-ZW97 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH1344-2DB40-0KA0-ZW97 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1344-2DB40-0KA0-ZW97 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth114 mm

Product details

Its 24 V DC coil pulls in at 3.2 W and holds at the same 3.2 W, so the coil draw is constant; no economizer circuit inside. The four normally-open instantaneous contacts (4 NO, zero NC) are rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, which covers most PLC output interposing and signal-level switching in a panel. Built-in varistor surge suppression on the coil means you don't need an external flyback diode or RC snubber for DC switching — the varistor clamps the inductive kick. That saves a wiring step and one component on the DIN rail.

Mounts via screw or snap-on to a DIN rail. That's standard for control wiring up to 14 AWG. No special ferrule requirement, but stranded wire benefits from a ferrule for reliable clamping in the screw terminal.

Shock resistance is 10g at 5 ms and 5g at 10 ms — tough enough for most industrial panels but not for direct machine-mount on a vibrating press. RoHS compliance date is July 1, 2006, covering the standard EU substance restrictions.

Frequently asked questions

Where can I buy 3RH1344-2DB40-0KA0-ZW97?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the rated current of 3RH1344-2DB40-0KA0-ZW97 at different voltages?

The contacts are rated 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. These are the thermal current ratings for the 4 NO contacts.

Does 3RH1344-2DB40-0KA0-ZW97 have built-in surge suppression?

Yes, the coil includes a built-in varistor surge suppressor. No external flyback diode or RC snubber is needed for DC switching.

What is the mechanical life of this contactor?

Typical mechanical life is 10 million switching operations. Contact reliability is one incorrect operation per 100 million cycles at 17 V, 1 mA.

MPN
3RH1344-2DB40-0KA0-ZW97