Product Description

The DKFT1800A 8-18 Fast Turn-Off Thyristor is a high-power semiconductor device designed for demanding industrial switching and power control systems. It features an interdigitated amplifying gate, fast switching capability, high di/dt performance, and low switching loss, making it suitable for heavy-duty converter and heating equipment. With an average on-state current of 1800A, a repetitive peak off-state and reverse voltage range of 800V to 1800V, and surge current capability up to 21kA, this thyristor delivers strong current handling and reliable switching performance. Its double-side cooled structure, low thermal resistance of 0.013°C/W, and 820g robust disc package help ensure stable thermal performance in high-power operating conditions.

 Features

• Interdigitated amplifying gate: Enables fast triggering and stable gate control

• Fast switching performance: 18–50μs turn-off time supports rapid switching applications

• High current capability: Rated for 1800A average on-state current

• Low switching losses: Helps improve efficiency and reduce thermal stress

• High surge capability: Withstands up to 21kA surge current for reliable operation

• Double-side cooling design: Improves heat dissipation in high-power systems

• 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