C393B

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The controlled rectifier is an active electrical device made of semiconductor material that can be used to control the current flow in an alternating current circuit. In contrast to a diode, a controlled rectifier has a control element that can be used to control the start and stop of the rectifier. A variety of thyristor devices can be used as the controllable rectifier. Among them, the C393B is a popular choice for many applications.

C393B application field

The C393B is widely used in power conversion, high power switching applications, and other related fields. It is also used in current and voltage control, boosting, AC motor speed control, phase control, power line phase shifting, braking, and power factor correction, etc. It can be used in high voltage lines and is frequently used in adjustable speed drives, UPS applications and motor soft starters. Because of its wide range of applications, the C393B is considered the most reliable semiconductor device for high power applications.

C393B Working Principle

The C393B works by controlling the voltage applied to the gate contact. When the required voltage is exceeded, a gate current flows, allowing current to flow from the cathode to anode. The voltage applied to the gate is called the firing or triggering voltage. When the gate contact is switched off, the device acts as a unidirectional resistance with an on/off ratio of 10:1 or more. When the firing voltage is applied, the current rises to a peak value and stays at that level until the firing voltage is removed. The device then ceases conduction and returns to the non-conductive state.

Conclusion

The C393B is a popular thyristor device used in a variety of applications. It is an ideal choice for controlling current and voltage applications and other power devices. Its simple operating principle makes it a reliable and economical solution for many applications. With its wide range of applications, the C393B is undoubtedly a market leader in the power semiconductor industry.

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