Siemens SIRIUS 3RT1044-1AV04 power contactor, S3 size, screw-type terminals, 37 kW at 500 V, AC-2/AC-4 duty, IP20 front.
| 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 | 400 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 |
It mounts via screw or snap-on onto 35 mm or 75 mm standard DIN rail, with a width of 70 mm and depth of 188 mm — fits a standard 8-module-wide panel cutout.
Rated 37 kW at 500 V and 18.6 kW at 690 V, this contactor handles typical three-phase induction motors in the 30–40 kW range on a 400 V supply.
Solid wire: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max. 2x (0.75... 4 mm²). Stranded: 2x (10... 50 mm²).
The 3RT1044-1FB46 is a peer in the same SIRIUS family, but it uses a different coil voltage or terminal arrangement. The 3RT1044-1AV04 has screw terminals and a specific coil rating; the 1FB46 variant may differ in coil voltage or auxiliary contact configuration. Check the coil voltage and terminal style before substituting.
The depth is 188 mm.
The screw terminals accept 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), and max. 2x (0.75... 4 mm²) solid wire.
Both are SIRIUS S3 contactors with the same mounting footprint (70 mm width, snap-on rail). The physical swap is straightforward, but verify the coil voltage and auxiliary contact configuration — the 1FB46 may have a different coil or integrated aux block.
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