The 3RT5044-1AG20: Mounting position is flexible: the contactor can be rotated ±180° on a vertical surface, and tilted forward or backward by ±22.5°. Operating temperature range is -25 to +60 °C; storage range extends to -55 to +80 °C. Pollution degree 3 rating means it tolerates conductive pollution in industrial environments — no additional conformal coating required for typical panel conditions.
Siemens 3RT5044-1AG20 SIRIUS Power Contactor, S3, 70 mm
MPN3RT5044-1AG20
Siemens SIRIUS S3 power contactor, 3RT5044-1AG20, screw-type terminals, 70 mm width, 1000 V insulation voltage, 59 kW at 400 V 60 °C.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S3 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 690 V | 18.6 kW |
| Rated value @ 230 V | 6 A |
| Rated value @ 24 V | 6 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 | 0.27 |
| Rated value @ 50 Hz | 110 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 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 DIN 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 | 139 mm |
| Parameter | Value |
|---|---|
| At AC | 5 000 1/h |
Product details
Frequently asked questions
What are the key motor power ratings for 3RT5044-1AG20?
At 60 °C ambient, the contactor is rated for 34 kW at 230 V, 59 kW at 400 V, and 102 kW at 690 V. These are the AC-3e / AC-3 motor switching ratings — the values that determine fit for a given motor load.
What compliance documentation does Siemens provide for 3RT5044-1AG20?
The part carries a substance prohibitance date of 03/01/2017, confirming RoHS and REACH compliance as of that date. Standard Siemens declarations of conformity and the CE mark apply; UL and CSA listings are typical for this SIRIUS series but should be verified per the specific catalog number.
Where can I buy 3RT5044-1AG20 and how is it quoted?
This part is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here. Submit an RFQ for a firm commercial offer.
MPN
3RT5044-1AG20