Rated for AC-3 motor duty, it switches 4 kW at 400 V, 4.5 kW at 500 V, and 5.5 kW at 690 V — these are the operating points that govern the motor load it can handle, not the thermal current alone. The 10 A rated operational current at AC-12 (resistive) gives a ceiling for control-circuit switching. Main terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²) solid, or 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm² stranded. Auxiliary terminals share the same screw-clamp design, simplifying wiring across the panel. IP20 on the front, IP00 at the terminals — the terminal area is unprotected, so it requires enclosure clearance from live parts. For coordination, a gL/gG fuse of 25 A meets type 2 coordination requirements; a 63 A fuse meets type 1.
Siemens 3RT1023-1AK60 SIRIUS Power Contactor, S0, 4 kW at 40
MPN3RT1023-1AK60
Siemens SIRIUS, power contactor, 3RT1023-1AK60, size S0, 45 mm width, 4 kW at 400 V AC-3, screw-type terminals, snap-on DIN rail mounting.
$199.03Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-4 @ 400 V | 8.5 A |
| Rated value @ 400 V | 4 kW |
| Rated value @ 500 V | 4.5 kW |
| Rated value @ 690 V | 5.5 kW |
| 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: 63 A |
| Short-circuit coordination type 2, fuse | fuse gL/gG: 25 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, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| 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 |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 91 mm |
Product details
Frequently asked questions
What are the key motor power ratings for this contactor?
In AC-3 duty, it is rated for 4 kW at 400 V, 4.5 kW at 500 V, and 5.5 kW at 690 V. These are the load-switching limits for induction motors.
Does the 3RT1023-1AK60 mount on a standard DIN rail?
Yes, it supports both screw and snap-on mounting onto a 35 mm standard mounting rail per DIN EN 50022.
What wire sizes do the screw terminals accept?
Main circuit terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²) solid, or 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm² stranded.
MPN
3RT1023-1AK60