What is the structure of a thyristor? What are the characteristics?

What is the structure of a thyristor? What are the characteristics?

Thyristor is a semiconductor device and a type of switching transistor, widely used as a switch in power electronic systems. A thyristor is a type of transistor made of n-type silicon semiconductor and has three electrodes: anode, cathode, and control electrode.

The structure of a thyristor includes a substrate of n-type silicon semiconductor, an enhanced type of n+- type silicon semiconductor, and a junction of p-type silicon semiconductor. Create a p-n junction on an n-type silicon semiconductor substrate, and coat one side of the p-n junction with an n+- type silicon semiconductor to form an n-p-n structure. Applying an appropriate voltage to the control electrode can trigger the conduction of the thyristor.

Thyristors have the following characteristics:

Controllability: Thyristors can control their conductivity by applying appropriate voltage to the control electrode to regulate their conductivity.

Triggering: Thyristors can be triggered at lower voltages, meaning the triggering voltage is relatively low.

High frequency characteristics: Thyristors can operate at high frequencies, with very fast switching speeds, and can operate at frequencies of several hundred kHz.

Reverse saturation voltage: Thyristors have a very high reverse saturation voltage and can withstand reverse voltage.

Voltage resistance: Thyristors have a relatively high voltage resistance and can withstand high voltages.

Switching characteristics: Thyristors can be used as a type of switching transistor and can operate in a switching state.

Stability: Thyristors have good stability and will not be damaged due to factors such as overvoltage or overcurrent.

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