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Siemens 3RH2344-1DB40 — Contactors

Siemens 3RH2344-1DB40 SIRIUS Auxiliary Contactor, 4 NO, 24 V

MPN3RH2344-1DB40
Active

Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, 24 VDC coil with varistor, screw and snap-on 35 mm DIN rail mounting.

Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH2344-1DB40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2344-1DB40 — 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 @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2344-1DB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2344-1DB40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2344-1DB40 — 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 DIN rail
3RH2344-1DB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH2344-1DB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2344-1DB40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth117 mm
3RH2344-1DB40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

Coil pulls 24 VDC at 4 W closing power, and the contacts are rated 10 A at 24 V for DC switching — that's the number to size your control circuit by, not the AC ratings. Built-in varistor surge suppression means you don't need to add a separate snubber across the coil; the suppressor is designed in. The S00 footprint — 45 mm wide, 57.5 mm tall, 117 mm deep — fits alongside a contactor of the same frame size, sharing the rail without crowding adjacent devices.

Clearance and mounting position

Minimum clearances around the contactor: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. That's the air gap needed for arc extinguishing and heat dissipation — don't crowd it tighter in a dense panel. Mounting position is flexible: ±180° rotation on a vertical surface, and you can tilt it forward or backward by ±22.5° on that same vertical surface.

Rated for operation from -25 to +60 °C, storage from -55 to +80 °C.

Frequently asked questions

What is the depth of 3RH2344-1DB40?

The depth is 117 mm, with a width of 45 mm and height of 57.5 mm. This is the S00 frame size, standard for Siemens auxiliary contactors in this class.

Will 3RH2344-1DB40 drop into a panel specified for 3RH2140-1BP40?

Both are S00-frame auxiliary contactors with the same DIN-rail mounting and similar dimensions. The 3RH2344-1DB40 carries 4 NO contacts; the 3RH2140-1BP40 may have a different contact configuration. Verify the contact arrangement matches your circuit before swapping, but the mechanical fit and rail footprint are identical.

What compliance documentation does Siemens provide for 3RH2344-1DB40?

The part carries RoHS compliance dated July 1, 2006, and the SIRIUS series typically holds CE, UL, CSA, and IEC certifications. Full declarations and certificates are available through the Siemens Industry Online Support portal.

MPN
3RH2344-1DB40