CQ202-4B

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The CQ202-4B is a TRIAC (Triode AC Switch), a game-changing technology that is becoming increasingly popular in the control and automation industries. This type of thyristor can be used in a variety of applications, as an on/off switch, as a driver for digital logic, and as a pulse width modulator (PWM). It is suitable for a variety of applications due to its small size, low cost, and high current ratings.

The CQ202-4B is a phase-controlled thyristor and is used in AC circuits, such as AC motor control or dimmers for lights. This device is used in circuits where the output current or voltage needs to be controlled from a position far away from the current or voltage source. The TRIAC is triggered into conduction when a positive voltage appears at its gate terminal. When the gate voltage is removed or decreased, the TRIAC current gradually decreases and finally it turns off.

The CQ202-4B has a 500mA forward blocking current rating and can be used in a variety of applications. One of the most common applications of this split-phase thyristor is in AC motor control. By controlling the current flowing through the motor, it is possible to fine-tune the speed, torque and voltage of the motor. It is also used in AC load switching applications where the load should be switched on in either forward or reverse direction. In this application, the thyristor can be used to switch on the load as well as to control the current flow.

Apart from this, the CQ202-4B can also be used in a variety of pulse width modulation (PWM) applications, such as DC-to-DC converters, AC dimmers, and in motor speed controllers. PWM is a technique of controlling the ON and OFF times of the TRIAC to control the output current or voltage. The thyristor is triggered during the ON cycle, and then switched off during the OFF cycle. PWM is a relatively simple and low-cost means of controlling output voltage or current.

Finally, the CQ202-4B can also be used as a digital logic driver. It can be used to drive other circuit elements with a high current pulse. This is especially useful in high-power circuits, where other types of switches may not be able to handle the high current requirements. The TRIAC can be used in conjunction with other devices, such as IC timers, to form a complete digital logic circuit.

In summary, the CQ202-4B TRIAC is a very useful device with a multitude of applications. It is well suited for AC motor control, AC load switching, PWM control and digital logic control. It is a cost-effective and reliable solution to a variety of power control applications.

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