晶閘管（Thyristor）是晶體閘流管的簡稱，又可稱做可控硅整流器，從前被簡稱為可控硅；1957年美國通用電器公司開宣告世界上款晶閘管產品，并于1958年將其商業(yè)化；晶閘管是PNPN四層半導體結構，它有三個極：陽極，陰極和門極; 晶閘管具有硅整流器材的特性，能在高電壓、大電流條件下作業(yè)，且其作業(yè)進程可以控制、被廣泛運用于可控整流、交流調壓、無觸點電子開關、逆變及變頻等電子電路中。
Transistor is a device composed of three layers of impurity semiconductors, which has three electrodes, so it is also called semiconductor triode, crystal triode, etc. it can be used for detection, rectification, expansion, switching, voltage stabilization, signal modulation and many other functions.
Thyristor is the abbreviation of thyristor, also known as silicon controlled rectifier, which was formerly referred to as silicon controlled rectifier; In 1957, General Electric Company of the United States announced the world's first thyristor product, and commercialized it in 1958; Thyristor is a pnpn four layer semiconductor structure, which has three poles: anode, cathode and gate; Thyristor has the characteristics of silicon rectifier equipment, which can operate under high voltage and large current conditions, and its operation process can be controlled. It is widely used in controllable rectifier, AC voltage regulation, contactless electronic switch, inverter, frequency conversion and other electronic circuits.
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