The Siemens 3RT2025-1AC208K is a SIRIUS 3RT2 series S0 frame 3-pole power contactor designed for switching three-phase motors up to 7.5 kW at 400 V AC. It comes with mirror contact elements, screw terminals, and an AC control coil (typically 24 V AC, 50/60 Hz depending on variant), making it suitable for industrial motor starters, MCC panels, HVAC systems, and automation applications.
This model belongs to the S0 size range, which is used for medium-duty motor control and offers higher current capacity and better thermal performance compared to S00 frame contactors.
According to Siemens SIRIUS technical datasheets, the 3RT2025 series is rated around 17 A AC-3, supporting motors up to 7.5 kW at 400 V AC, with standard 3 NO main contacts and auxiliary contact configuration (1 NO + 1 NC depending on variant).
The mirror contact elements provide mechanically linked feedback of the main contacts, which is essential for PLC interlocking, safety circuits, and machine status monitoring, ensuring the controller can verify the real ON/OFF state of the contactor for safe operation.
With screw terminals, wiring remains secure, vibration-resistant, and suitable for long-term industrial use in control panels.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2025-1AC208K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 17 A |
| Motor Rating | 7.5 kW @ 400 V AC |
| Coil Type | AC Coil (variant dependent) |
| Auxiliary Contact | 1 NO + 1 NC |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S0 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
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