光控可控硅又称光激可控硅或光控硅晶闸管。其优点是:通过主电路与控制电路的光耦合,可以抑制噪音干扰。主电路和控制电路相互隔离,容易满足对高压绝缘的要求。使用光控可控硅元件,不需要控制极触发脉冲变压器,可减小装置的体积与重量,提高可靠性。单个光控可控硅元件输出电流可达安培级,其大小不随光强变化而变化。由于上述特点,光控可控硅作为自动控制元件已广泛用于光继电器、自控、隔离、输入开关、光计数器、红外探测器、光报警器、光触发脉冲发生器、液位控制器等方面。七十年代末,出现了大功率光控可控硅元件,它主要用于大电流脉冲装置和高压直 Light controllable silicon, also known as light-activated silicon or light-controlled silicon thyristors. The advantage is: through the main circuit and the control circuit of the optical coupling, you can suppress noise interference. The main circuit and the control circuit are isolated from each other, easily meeting the requirements of high voltage insulation. The use of light-controlled thyristor components, does not require the control of the trigger pulse transformer can reduce the size and weight of the device to improve reliability. A single light-emitting thyristors output current up to amperes, the size does not change with the light intensity changes. Because of the above characteristics, light-controlled silicon as an automatic control element has been widely used in optical relays, automatic control, isolation, input switches, optical counters, infrared detectors, light alarm, light trigger pulse generator, liquid level controller . The late seventies, there have been high-power light-controlled thyristor components, it is mainly used for high-current pulse devices and high-pressure straight