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Siemens 3RH2344-1CN20-0KA0 — Contactors

Siemens SIRIUS 3RH2344-1CN20-0KA0 Auxiliary Contactor, 4 N/O

MPN3RH2344-1CN20-0KA0
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Siemens SIRIUS auxiliary contactor, Size S00, 4 N/O instantaneous contacts, 45 mm width, screw and snap-on mounting onto 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RH2344-1CN20-0KA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH2344-1CN20-0KA0 — 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 @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2344-1CN20-0KA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RH2344-1CN20-0KA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2344-1CN20-0KA0 — 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
3RH2344-1CN20-0KA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH2344-1CN20-0KA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2344-1CN20-0KA0 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth117 mm
3RH2344-1CN20-0KA0 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

It is designed to switch control signals and auxiliary loads in motor control centers and panel builds, not to switch motor power directly — that is the job of the main contactor it rides alongside. The 45 mm width and 117 mm depth fit the standard S00 footprint, and it mounts via screw or snap-on onto 35 mm DIN rail, with +/-180° rotation possible on a vertical surface and +/-22.5° tilt forward or backward. Rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, the contact ratings drop as voltage climbs — at 600 V it is rated 0.26 A, and at 690 V it handles 1 A. These are the current-carrying limits for the auxiliary contacts under the respective AC voltage conditions; for a given control voltage on the panel, pick the row that matches your line voltage to confirm the contact can handle the load.

Wire connections accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid or stranded. The arcing time sits at 10 to 15 ms at AC, and the switching frequency at DC reaches 10,000 operations per hour — useful for fast-cycling applications like conveyor logic or valve sequencing.

Frequently asked questions

What are the key dimensions for panel layout?

Width is 45 mm, depth is 117 mm, height is 57.5 mm. Clearance required: 10 mm upwards, forwards, and downwards; 6 mm at the side.

What wire sizes does this contactor accept?

It accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid or stranded conductors.

What compliance documentation is available?

The part carries a RoHS substance prohibition date of 07/01/2006, indicating compliance with the EU RoHS directive. Further documentation would be provided by Siemens upon request.

MPN
3RH2344-1CN20-0KA0