The SCR is a four layer and three terminal device. SCR symbol and its terminals are shown in figure.īack to top Construction of Silicon Controlled Rectifier It can handle several thousands of voltages and currents. This results in varying the average power delivered at the load, by varying the ON periods of the SCR. SCR has built in feature to turn ON or OFF and its switching is controlled by biasing conditions and gate input terminal. SCR is a three terminal device anode, cathode and gate as shown in figure. Like a diode, SCR is a unidirectional device that allows the current in one direction and opposes in another direction. SCR can be used for different applications like rectification, regulation of power and inversion, etc. The Silicon Controlled Rectifier (SCR) is the most important and mostly used member of the thyristor family. Advantages of Silicon Controlled Rectifier.Construction of Silicon Controlled Rectifier.
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