The Siemens 3RT2024-1BF40 is a SIRIUS 3RT2 series S0 frame 3-pole power contactor designed for reliable switching of three-phase motors up to 5.5 kW at 400 V AC. It features mirror contact elements, screw terminals, and a 110 V DC control coil, making it suitable for industrial motor control, automation systems, and control panel applications.
This model belongs to the S0 frame size, which is used for medium-duty motor applications and provides higher current capacity than S00 series contactors.
According to Siemens SIRIUS technical datasheets, the 3RT2024 family is rated at 12 A AC-3, supporting motors up to 5.5 kW at 400 V AC, with 3 NO main contacts and auxiliary contacts (typically 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 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 in control cabinets.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2024-1BF40 |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 12 A |
| Motor Rating | 5.5 kW @ 400 V AC |
| Coil Type | 110 V DC |
| 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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