The Siemens 3RT2023-1AC20 is a SIRIUS 3RT2 series 3-pole power contactor designed for reliable switching of three-phase motors up to 4 kW at 400 V AC. It features mirror contact elements, screw terminal connections, and a 24 V AC control coil, making it suitable for motor control centers (MCCs), automation systems, HVAC applications, and industrial power distribution systems.
This model belongs to the compact S0 frame size, which is a step above S00, offering higher current handling capability and better thermal performance for industrial motor switching applications.
According to Siemens SIRIUS catalog specifications, the 3RT2023 series is rated around 9 A AC-3, suitable for motors in the 4 kW (400 V) range, and is widely used in standard starter combinations with overload relays and auxiliary contact blocks.
The integrated mirror contact elements provide mechanically linked feedback of the main contacts, which is essential for PLC interlocking, safety circuits, and machine monitoring systems, ensuring the controller can verify the actual ON/OFF state of the contactor for safe operation.
With screw terminals, installation remains secure, vibration-resistant, and suitable for long-term industrial use.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2023-1AC20 |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 9 A |
| Motor Rating | 4 kW @ 400 V AC |
| Coil Type | 24 V AC |
| Auxiliary Contact | 1 NO + 1 NC (base configuration) |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S0 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
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