| 摘要 |
A compound electrical circuit unit comprises a main, high power type thyristor and auxiliary low power control semiconductor elements structurally and electrically united to form a compact assembly which is enclosed within a housing. At least some of the auxiliary semiconductor elements such as low power thyristors are established directly on the disc of semiconductor material which forms the main power thyristor, and light responsive elements, such as light sensitive thyristors, are connected to, and control the auxiliary thyristors, the light-sensitive thyristors being exposed to light through a window in the housing.
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