CQ218I-25N

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Thyristors are a type of semiconductor that is used in AC and DC power control technology. Thyristors, also called TRIACs, are essentially two transistors connected back-to-back that work together. thyristors and gate turn-off thyristor (GTO thyristor) are the two main types of thyristors available. A CQ218I-25N is a three-terminal bidirectional thyristor designed for continuous conduction, and is one of the most commonly used thyristors.

Application and Working Principle of CQ218I-25N Thyristors

The CQ218I-25N is widely used in low-voltage and medium-power AC and DC power control applications. It has a typical operating voltage of 600V and a typical blocking voltage of 800V, but can operate at voltages up to 1100V. As a three-terminal bidirectional thyristor, the CQ218I-25N has two main terminals (anode-1 and anode-2) and one gate terminal. The gate terminal is used to control the flow of current between the two main terminals, and is typically insulated from the other two terminals.

The working principle of the CQ218I-25N is similar to that of a conventional thyristor. When the anode-1 terminal is positive with respect to anode-2 and the gate terminal is maintained positive, the device is forward-biased and the main terminal current flows from anode-1 to anode-2. Similarly, when the anode-2 is positive with respect to anode-1 and the gate terminal is kept positive, the device is forward-biased and the main terminal current flows from anode-2 to anode-1.

The CQ218I-25N has a low on-state voltage drop, which makes it an ideal choice for applications that require high efficiency and low power loss. It is also capable of operating at frequencies up to 100kHz. This makes it well-suited for applications such as motor speed control, AC and DC power control, and inverter applications.

Advantages of CQ218I-25N Thyristors

The CQ218I-25N is designed to provide excellent performance in low-voltage and medium-power AC and DC applications. Its three-terminal design makes it easy to control the main terminal current in both directions, allowing it to be used in a variety of power control applications. Its low on-state voltage drop makes it an ideal choice for applications that require high efficiency. Furthermore, its high capacitance and low switching losses make it well-suited for applications where power loss and noise are of concern. It is also capable of operating at frequencies up to 100kHz, making it an excellent choice for applications such as motor speed control and inverter applications.

Conclusion

The CQ218I-25N is a three-terminal bidirectional thyristor which is well-suited for low-voltage and medium-power AC and DC power control applications. It has a low on-state voltage drop, making it an ideal choice for applications that require high efficiency and low power loss. Furthermore, its high capacitance and low switching losses make it an excellent choice for applications where power loss and noise are of concern. Its three-terminal design makes it easy to control the main terminal current in both directions, making it an ideal choice for a variety of power control applications.

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