The static induction transistor (SIT) is a type of field-effect transistor (FET) capable of high-speed and high-power operation, with low distortion and low noise.
[2] Being a vertical device, the SIT structure offers advantages in obtaining higher breakdown voltages than a conventional FET.
For the SIT, the breakdown voltage is not limited by the surface breakdown between gate and drain, allowing it to operate at a very high current and voltage.
The SIT has a current-voltage characteristic similar to a vacuum tube triode and it was therefore used in high-end audio products, including power amplifiers from Sony in the second half of the 1970s and Yamaha from 1973-1980.
The Sony n-channel SIT had the model number 2SK82 with its p-channel complement named 2SJ28.