The DKFT800 8-16 is a fast turn-off thyristor designed for high-speed switching and efficient power control in demanding industrial systems. Built with an interdigitated amplifying gate structure and a robust metal-ceramic package, this device provides excellent thermal performance, fast switching capability, and reliable surge handling. With a current rating of 300A and voltage capability up to 1600V, it is well suited for converters, chopper circuits, and induction heating applications requiring stable and efficient switching performance.
Product Description
The DKFT800 / 8-18 Fast Turn-Off Thyristor is a high-power semiconductor device designed for demanding switching applications in industrial power systems. It features an interdigitated amplifying gate, fast switching capability, high di/dt performance, and low switching loss, making it suitable for converters, choppers, and induction heating equipment. The device delivers an average on-state current of 800A, supports a repetitive peak off-state and reverse voltage range of 800V to 1800V, and provides a surge current capacity of 12kA. With a double-side cooled structure, low thermal resistance of 0.024°C/W, and a compact C19 disc package, it offers reliable thermal performance and stable operation in high-power systems. The outline drawing on page 3 shows an approximate 68mm flange diameter, 59mm body diameter, and 26.5 ±0.5mm height.
Features
Interdigitated amplifying gate: Enables fast triggering and stable gate control
Fast switching performance: 18–50μs turn-off time supports rapid switching applications
High di/dt capability: Handles demanding current rise conditions in power circuits
Low switching losses: Helps improve system efficiency and reduce thermal stress
High surge capability: Withstands up to 12kA surge current for reliable operation
Double-side cooling design: Improves heat dissipation and supports stable performance
Wide voltage range: Available from 800V to 1800V repetitive peak voltage ratings
Applications
Power converters
DC chopper systems
Induction heating equipment
Industrial power control systems
High-current switching circuits
Medium- and high-power electronic equipment
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