晶闸管（Thyristor）是晶体闸流管的简称，又可称做可控硅整流器，从前被简称为可控硅；1957年美国通用电器公司开宣告世界上款晶闸管产品，并于1958年将其商业化；晶闸管是PNPN四层半导体结构，它有三个极：阳极，阴极和门极; 晶闸管具有硅整流器材的特性，能在高电压、大电流条件下作业，且其作业进程可以控制、被广泛运用于可控整流、交流调压、无触点电子开关、逆变及变频等电子电路中。
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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