The Siemens 3RT2023-1AL208K is a SIRIUS 3RT2 series S0 frame 3-pole power contactor designed for reliable switching of three-phase motors up to around 4 kW at 400 V AC. It features mirror contact elements, screw terminals, and an AC/DC control coil (230 V AC, 50/60 Hz), making it suitable for industrial motor control, automation panels, HVAC systems, and starter circuits.
This model belongs to the S0 size range, which is commonly used for medium-duty motor applications, offering higher thermal capacity and better durability compared to S00 frame contactors.
According to Siemens SIRIUS technical data for the 3RT2023 S0 series, the contactor is typically rated at 9 A AC-3, supporting motor loads up to approximately 4 kW at 400 V AC, with standard 3 NO main contacts and auxiliary contacts (usually 1 NO + 1 NC depending on variant).
The mirror contact elements provide mechanically linked feedback of the main contacts, which is important for PLC interlocking, safety circuits, and machine status monitoring, ensuring the controller can verify the actual ON/OFF state of the contactor for safe operation.
With screw terminals, the installation remains robust, vibration-resistant, and suitable for long-term industrial use in control cabinets.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2023-1AL208K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | ~9 A |
| Motor Rating | ~4 kW @ 400 V AC |
| Coil Type | AC/DC (230 V control family) |
| Auxiliary Contact | 1 NO + 1 NC (variant dependent) |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S0 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
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