Freewheeling diode family

Our prime diode disc series consist of robust and powerful disc device types developed for the special requirements of medium-voltage IGCT inverter applications. All devices are designed for high surge current capability. For IGCT inverter applications in particular, they are optimized to achieve excellent soft recovery behavior even under the most demanding turn-off conditions.

High-tech production processes deliver outstanding dynamic parameters for best-cost designs with extreme soft recovery behavior to avoid overvoltage at the IGCT device. For some applications they are also suitable as clamping or freewheeling diodes for presspack IGBTs under significantly more demanding turn-off di/dt conditions.
This results in benefits such as a simplified mechanical stack construction with series stacking of press-pack IGBTs and freewheeling diodes. In addition, a time saving of 50% in stack design, fewer safety devices required thanks to high overload capability and an ideal applicability for building of gigawatt HVDC installations with low power losses.