A module is a separate unit of software or hardware. Typical characteristics of modular components include portability, which allows them to be used in a variety of systems, and interoperability, which allows them to function with the components of other systems.
The symbol for SCR is also shown in figure which is very familiar to Diode's Symbol. An SCR is a short form for Silicon Controlled Rectifier, Which is a three terminal semiconductor device.This device is used for rectification, regulation and inversion etc. It is also used as a controlled switch in high rating instruments. That is why this device has such importance.It is a Unidirectional Power Switch.he symbol for SCR is also shown in figure which is very familiar to Diode's Symbol. An SCR is a short form for Silicon Controlled Rectifier, Which is a three terminal semiconductor device.
The term SCR or silicon controlled rectifier is often used synonymously with that of thyristor - the SCR or silicon controlled rectifier is actually a trade name used by General Electric. The idea for the thyristor was first described by Shockley in 1950.