3RT1056-2AD36 - Siemens
power contactor, AC-3e/AC-3 185 A, 90 kW / 400 V AC (50-60 Hz) / DC Uc: 42-48 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: spring-loaded terminal
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S6 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 160 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 30 hp |
| 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/DC |
| Rated value @ 50 Hz | 0.8 |
| Rated value @ 50 Hz | 42 ... 48 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 | gG: 355 A (690 V, 100 kA) |
| Short-circuit coordination type 2, fuse | gG: 315 A (690 V, 100 kA), aM: 200 A (690 V, 50 kA), BS88: 315 A (415 V, 50 kA) |
| Aux. switch short-circuit protection, fuse | gG: 10 A (500 V, 1 kA) |
| Parameter | Value |
|---|---|
| Main circuit connection | Connection bar |
| Aux. / control circuit connection | spring-loaded terminals |
| Conductor cross-section, solid | 2x (0.25 ... 2.5 mm²) |
| Conductor cross-section, solid or stranded | 2x (0,25 ... 2,5 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.25 ... 1.5 mm²) |
| Mounting method | screw fixing |
| 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 | 120 mm |
| Height | 172 mm |
| Depth | 170 mm |
| Parameter | Value |
|---|---|
| At AC | 40 ... 60 ms |
Frequently asked questions
What are the specifications of the Siemens 3RT1056-2AD36 contactor?
Engineers and buyers need full electrical and mechanical specs to confirm fit for motor load and panel layout.
What coil voltage does the 3RT1056-2AD36 use?
A 42-48 V DC coil must match the control circuit; wrong coil voltage prevents operation or damages the contactor.
Is the 3RT1056-2AD36 suitable for AC-3e applications?
AC-3e rating determines if the contactor handles modern IE3/IE4 motors with regenerative braking duty cycles.
What is the difference between 3RT1056 and 3RT1055 contactors?
Designers comparing frame sizes need to know current and kW ratings to avoid undersizing the contactor.
What is the price and current stock of the 3RT1056-2AD36?
Sourcing decisions and quote requests depend on live pricing and authorized-channel availability.
Where can I buy a direct replacement or cross-reference for the 3RT1056-2AD36?
Buyers facing lead-time risk need verified substitutes that match 185 A, 2 NO + 2 NC, and spring terminals.