A silicon-controlled rectifier: I -Characteristics and ratings

The name silicon-controlled rectifier has been given to a new 3-terminal semiconductor device which has electrical characteristics similar to a thyratron. This device has been developed by the Semiconductor Products Department of the General Electric Company and has been given the developmental designation ZJ-39A. Its characteristics are made possible through the use of a p-n-p-n junction configuration. It is capable of handling load currents up to 16 amperes average at peak voltages up to 300 volts. Its fast switching action, small size, and relatively high-current ratings make this new device adaptable to a great many applications. Its characteristics and ratings, which are of utmost importance to the circuit designer, are the subject of this discussion.