Hello everyone, It’ s Xiaoyi!br Xiaoyi has made videos of diodes and triodes before. Interested friends can go to the homepage to search. Today we will learn about thyristors.Structurebr A unidirectional thyristor (thyristor) is an N-P-N-P four-layer semiconductor structure with three PN junctions formed in the middle. There are three electrodes, namely anode A, cathode K, and gate G (also called control electrode)br .