The 3RT1044-1AL24: Rated at 37 kW at 500 V, this S3-frame contactor handles induction motors up to that power level in standard AC-3 duty. The screw-type terminals accept solid conductors up to 2x 4 mm² and stranded conductors up to 2x 50 mm², covering most panel wiring from control circuits to motor feeders. IP20 on the front with cover or box terminal protects against finger contact; the terminal body itself is IP00, so the panel enclosure provides the environmental seal. Side-by-side mounting is permitted, which simplifies multi-contactor motor starter assemblies on a single DIN rail.
Siemens 3RT1044-1AL24 SIRIUS Power Contactor, 37 kW at 500 V
MPN3RT1044-1AL24
Siemens SIRIUS S3 power contactor, 3RT1044-1AL24, 37 kW at 500 V, screw-type terminals, snap-on 35/75 mm DIN rail.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S3 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 55 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 37 kW |
| Rated value @ 690 V | 18.6 kW |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 2 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.3 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | AC |
| Rated value @ 50 Hz | 0.8 ... 1.1 |
| Rated value @ 50 Hz | 230 V |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | fuse gL/gG: 250 A |
| Short-circuit coordination type 2, fuse | fuse gL/gG: 125 A |
| Aux. switch short-circuit protection, fuse | fuse gL/gG: 10 A |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | screw-type terminals |
| Conductor cross-section, solid | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²) |
| Conductor cross-section, solid or stranded | 2x (2.5 ... 16 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 and 75 mm standard mounting rail |
| Side-by-side mounting | Yes |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 70 mm |
| Height | 146 mm |
| Depth | 188 mm |
| Parameter | Value |
|---|---|
| At AC | 10 ... 19 ms |
Product details
Frequently asked questions
How do I get current pricing and availability for 3RT1044-1AL24?
Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our independent distribution channels.
What is 3RT1044-1AL24's listed depth?
The depth is 188 mm, which is the critical dimension for enclosure depth clearance.
What solid conductor sizes does 3RT1044-1AL24 accept?
It accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²) solid conductors.
What compliance documentation does this brand provide for 3RT1044-1AL24?
As a Siemens SIRIUS product, it typically carries RoHS, REACH, and relevant IEC/UL certifications. Specific declarations are available upon request with the RFQ.
MPN
3RT1044-1AL24