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Siemens 3RH2344-1CK20 — Contactors

Siemens 3RH2344-1CK20 SIRIUS Auxiliary Contactor, 4 NO, 10 A

MPN3RH2344-1CK20
Active

Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, screw and snap-on mounting on 35 mm rail, 10 A at 24 V rated value.

Siemens 3RH2344-1CK20 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RH2344-1CK20 — Identification
ParameterValue
Contactor frame sizeS00
3RH2344-1CK20 — 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
3RH2344-1CK20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz120 V
3RH2344-1CK20 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2344-1CK20 — 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 standard mounting rail
3RH2344-1CK20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RH2344-1CK20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2344-1CK20 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth117 mm
3RH2344-1CK20 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

The Siemens 3RH2344-1CK20 is a SIRIUS auxiliary contactor in size S00, carrying 4 normally-open instantaneous contacts for switching control and signal circuits.

The contact rating drops as voltage rises: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 6 A at 230 V, 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. These are the maximum resistive or inductive loads the contacts can break at each voltage level — useful for verifying the contactor can interrupt a specific solenoid or relay coil without welding.

These clearances allow for heat dissipation and arc-flash containment during switching.

Frequently asked questions

What is the depth of 3RH2344-1CK20?

The depth is 117 mm.

What is the width of 3RH2344-1CK20?

The width is 45 mm.

Will 3RH2344-1CK20 drop into a panel specified for 3RH2362-2AF00 without rewiring?

Both are size S00 auxiliary contactors on a 35 mm DIN rail, so the mechanical footprint and rail mounting are compatible. However, the 3RH2344-1CK20 has 4 NO contacts, while the 3RH2362-2AF00 may differ in contact configuration — verify the wiring diagram before swapping.

What compliance documentation does Siemens provide for 3RH2344-1CK20?

The part is RoHS compliant as of 07/01/2006 and rated for degree of pollution 3 per IEC standards. Full compliance documentation (RoHS, REACH, UL, IEC) is available from Siemens on request.

MPN
3RH2344-1CK20