In the three phase modules, each of the six switch positions includes a 100A SiC MOSFET transistor and a 100A SiC Schottky freewheeling diode. These devices can block up to 1200V, which is said to provide enough headroom against overvoltage in a 540V aerospace DC bus. It can also be upgraded with 1700V/150A SiC devices.
Special care was given to thermal aspects during the design. All materials were selected to allow reliable operation at junction temperatures of up to 200°C, as well as case and storage temperatures of up to 150°C. The modules also feature an AlSiC baseplate, AlN substrates and silver sintering to offer high robustness against thermal and power cycling.
