Infineon T640N14TOF Phase Control Thyristor | Robust High-Power Switching Solution
The Infineon T640N14TOF is a high-performance phase control thyristor engineered for the most demanding industrial power conversion applications. Housed in a robust ceramic disc package, this device delivers exceptional reliability and thermal efficiency for systems requiring precise control of very high currents and voltages. It is the component of choice for high-power rectifiers, industrial drives, and grid infrastructure, where operational stability and long service life are non-negotiable.
Technical Deep-Dive: Core Advantages of the T640N14TOF
- Superior Power Handling & Low Conduction Losses: The T640N14TOF is built to manage substantial power levels, featuring a blocking voltage of 1400V. Its internal silicon structure is optimized for a very low on-state voltage drop (VT). This fundamental characteristic minimizes conduction losses, which is critical in applications processing hundreds of amperes. For the system designer, this translates directly to higher energy efficiency, reduced heat generation, and a smaller, more cost-effective cooling system.
- Pressure Contact Technology for Unmatched Reliability: The disc housing utilizes pressure contact technology, a design that eliminates wire bonds, which are common failure points in conventional modules. This press-pack design offers two key benefits: it enables efficient double-sided cooling for superior thermal management, and it ensures a predictable short-circuit failure mode. This is particularly vital in applications where multiple devices are connected in series, as it prevents catastrophic open-circuit failures and simplifies protective system design.
Key Technical Parameters
| Parameter | Value |
|---|---|
| Repetitive Peak Off-State Voltage (VDRM/VRRM) | 1400 V |
| Mean On-State Current (ITAVM @ TC=85°C) | 690 A |
| Surge Current (ITSM @ 10ms, 50Hz) | 8500 A |
| On-State Voltage (VT @ IT=1500A, Tj=125°C) | 1.75 V (Max) |
| Critical dV/dt | 1000 V/µs |
For a complete list of specifications, please refer to the official T640N14TOF Datasheet.
Application Scenarios: Where the T640N14TOF Excels
- High-Power Rectifiers: In industrial applications such as metal processing, electrolysis, and large-scale DC power supplies, the T640N14TOF provides a rugged and efficient backbone for the main rectifier stage. Its high surge current capability safely handles fault conditions, ensuring system uptime.
- Industrial Soft Starters: For large AC induction motors, this thyristor enables smooth, controlled voltage ramping. By implementing a back-to-back SCR topology, it drastically reduces mechanical shock on gearboxes and electrical stress from inrush currents, extending the lifespan of the entire drivetrain.
- Grid & Power Quality Systems: In Static VAR Compensators (SVC) and other Flexible AC Transmission Systems (FACTS), the T640N14TOF acts as a reliable high-power switch for controlling reactors and capacitors. Its proven robustness is essential for maintaining grid stability and power quality under dynamic load conditions.
Frequently Asked Questions (FAQ)
- What are the mounting requirements for the T640N14TOF disc package?This device requires a specific mounting clamp that applies a precise and evenly distributed force across its two surfaces. It is designed to be clamped between two heatsinks (double-sided cooling) to achieve its maximum thermal performance. Incorrect clamping force can lead to poor thermal contact or damage to the device.
- Can this thyristor be used for high-frequency applications like a PWM inverter?No, the T640N14TOF is a phase control thyristor designed for line-frequency (50/60 Hz) applications. Its turn-off characteristics are not suitable for the high-frequency switching required in PWM motor drives or solar inverters, for which IGBT modules are the appropriate choice.
By leveraging its robust design and high-power capabilities, the Infineon T640N14TOF provides a dependable foundation for your most critical power control systems. To discuss your specific application needs or to request a quote, please contact our technical specialists. Explore our full range of high-power semiconductor solutions for more options.
