SIRIUS S00 auxiliary contactor, 4 NO, 110 V DC coil
The 3RH2344-1DF40-0KA0: The built-in varistor surge suppressor clips the coil flyback spike, so you don't need an external snubber across the DC coil — one less component on the BOM.
Siemens 3RH2344-1DF40-0KA0 SIRIUS Auxiliary Contactor, 4 NO
MPN3RH2344-1DF40-0KA0
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Siemens SIRIUS 3RH2344-1DF40-0KA0 auxiliary contactor, size S00, 4 NO instantaneous contacts, 110 V DC coil, 4 W, screw and snap-on 35 mm DIN rail.
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
How we verify every order →Specifications
Identification
| Parameter | Value |
|---|---|
| Contactor frame size | S00 |
Ratings & Performance
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 4.7 A |
| Rated value @ 110 V | 3 A |
| Rated value @ 220 V | 1.2 A |
Control & Coil
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
Contacts & Poles
| Parameter | Value |
|---|---|
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
Connection & Mounting
| Parameter | Value |
|---|---|
| Conductor cross-section, solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm² |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm DIN rail |
Durability
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
Mechanical
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 57.5 mm |
| Depth | 117 mm |
Specifications
| Parameter | Value |
|---|---|
| At AC | 10 000 1/h |
Product details
Frequently asked questions
What is the closest alternative to 3RH2344-1DF40-0KA0 in the SIRIUS contactor family?
The 3RH2344-1DF40-0KA0 is a specific variant with 4 NO contacts and a 110 V DC coil; any replacement would need to match the S00 frame, contact configuration, and coil voltage.
What compliance documentation does Siemens provide for 3RH2344-1DF40-0KA0?
The part carries RoHS compliance dated July 1, 2006.
MPN
3RH2344-1DF40-0KA0