Siemens SIRIUS 3RT1045-3AF04 power contactor, size S3, AC-2 rated 37 kW at 400 V, AC-4 66 A, screw-type terminals, 70 mm width, 188 mm depth.
| Parameter | Value |
|---|---|
| Contactor frame size | S3 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 66 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 45 kW |
| Rated value @ 690 V | 21.1 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 | 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: 160 A |
| Aux. switch short-circuit protection, fuse | fuse gL/gG: 10 A |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | spring-loaded terminals |
| Conductor cross-section, solid | 2x (0.25 ... 2.5 mm²) |
| Conductor cross-section, solid or stranded | 2x (2.5 ... 16 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.25 ... 1.5 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 ... 25 ms |
For AC-4 duty (plugging, inching, reversing) at 400 V, the rating is 66 A, which governs the contactor's life under high-stress switching. At 500 V the motor power rating is 45 kW; at 690 V it drops to 21.1 kW. These are the numbers that decide whether this contactor survives the duty cycle on your BOM line.
Main power circuit uses screw-type terminals accepting 2x (10…50 mm²) stranded or 2x (0.25…2.5 mm²) solid.
AC-2 at 400 V: 37 kW. AC-4 at 400 V: 66 A. Motor power at 500 V: 45 kW; at 690 V: 21.1 kW.
RoHS compliance is documented with a substance prohibition date of May 1, 2012. The part is a Siemens SIRIUS product with standard IEC/UL certification applicable to the series.
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