The 3RT6025-1AC20: The AC-3 rating at 400 V (23 kW) is the motor-switching figure that governs real-world sizing for standard squirrel-cage induction motors. The 690 V rating (40 kW) applies where line voltage is higher, but the contactor's insulation voltage is also 690 V, so it stays within its rated insulation class. The switching rate of 5 000 operations per hour (AC) means it can handle frequent cycling on a conveyor or pump line without exceeding thermal limits.
Siemens 3RT6025-1AC20 SIRIUS Power Contactor, 23 kW at 400 V
MPN3RT6025-1AC20
Siemens SIRIUS power contactor, S0 size, 3RT6025-1AC20, AC-3 rated 23 kW at 400 V 60°C, screw terminals, 45 mm width, 97 mm depth, DIN rail mount.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 10 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 | 0.25 |
| Rated value @ 50 Hz | 24 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 | gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 63 A |
| Short-circuit coordination type 2, fuse | gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 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 or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 DIN rail according to DIN EN 50022 |
| 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 | 45 mm |
| Height | 85 mm |
| Depth | 97 mm |
| Parameter | Value |
|---|---|
| At AC | 5 000 1/h |
Product details
Frequently asked questions
What are the motor power ratings for the 3RT6025-1AC20?
At 400 V and 60 °C, the AC-3 motor rating is 23 kW; at 690 V and 60 °C, it is 40 kW. At 230 V and 60 °C, the rating is 13.3 kW.
Where can I buy the 3RT6025-1AC20 and how is it quoted?
The contactor is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote.
What is the physical size of the 3RT6025-1AC20?
The S0 contactor measures 45 mm wide, 97 mm deep, and 85 mm high. It mounts on a 35 mm DIN rail per DIN EN 50022.
MPN
3RT6025-1AC20