The Siemens 3RT2024-1BB408K 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 comes with mirror contact elements, screw terminals, and a 24 V DC control coil (with integrated suppression/diode module depending on variant family), making it suitable for industrial motor starters, automation panels, and control systems.
This model belongs to the S0 size range, which is widely used in industrial applications for medium-duty motor loads, offering higher durability and thermal performance compared to S00 frame contactors.
According to Siemens SIRIUS technical datasheets for the 3RT2024 S0 series, the contactor is typically rated at 12 A AC-3, supporting motor loads up to 5.5 kW at 400 V AC, with 3 NO main contacts and auxiliary contacts (commonly 1 NO + 1 NC depending on configuration).
The mirror contact elements provide mechanically linked feedback of the main contacts, which is essential for PLC interlocking, safety circuits, and machine status monitoring, allowing the controller to verify the actual switching state of the contactor for safe operation and diagnostics.
With screw terminals, the device ensures strong, vibration-resistant wiring suitable for long-term industrial use in control cabinets.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2024-1BB408K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 12 A |
| Motor Rating | 5.5 kW @ 400 V AC |
| Coil Type | 24 V DC (diode/suppression variant 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 |
No reviews yet.