brief introduction： SCR, is the abbreviation of SCR rectifier element, is a kind of high-power semiconductor device with three PN junction four-layer structure, also known as thyristor.It has the characteristics of small size, relatively simple structure and strong function, and is one of the more commonly used semiconductor devices.The device is widely used in various electronic equipment and electronic products, mostly used for controllable rectifier, inverter, frequency conversion, voltage regulation, contactles

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