Silicon Controlled Rectifier Actual. It is the most commonly used and highest power rated thyristor currently available. A silicon controlled rectifier scr is a four layer pnpn semiconductor device that uses three electrodes for normal operation.
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A silicon controlled rectifier or scr is essentially a shockley diode with an extra terminal added. The principle of four layer p n p n switching was developed by moll tanenbaum goldey and holonyak of bell laboratories in 1956. Scr devices also feature a preset holding current value below which they will not conduct even if switched on.
A silicon controlled rectifier scr is a four layer pnpn semiconductor device that uses three electrodes for normal operation.
A silicon controlled rectifier is made up of 4 semiconductor layers of alternating p and n type materials which forms npnp or pnpn structures. Scrs are mainly used in electronic devices that require control of high voltage and power. The name silicon controlled rectifier is general electric s trade name for a type of thyristor. It can also be applicable in medium and high ac power operations like motor control function.
