CQ218-45N

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Thyristors - TRIACs

A Thyristor - TRIAC (T1) is an electronic component that is used widely in power control applications. It is a semiconductor component that opens and closes an electrical contact between two or more terminals, allowing an electric current to flow through them when switched on. A TRIAC is a three terminal component, whereas diodes and transistors are two terminal components. As such, they are often referred to as three-terminal devices or three-terminal components.

The CQ218-45N is a type of TRIAC specifically designed to be used as an electronic switch or rectifier. This component is most commonly employed in motor control, HID Lighting, thermostatic control devices, and adjustable power generators. The CQ218-45N is especially suited for applications when high turn-off speeds are required, such as the short-term switching of high power lamps. This component is a surface mount version (SMD) with a TO-220 package.

Working Principle of CQ218-45N

The CQ218-45N is designed to be used in switching applications for controlling the flow of an electrical current. When a TRIAC is used, it is important to ensure that the opposite junction will not be exposed to voltage levels greater than its maximum rating, as this can cause permanent damage or destruction of the component. This device is widely used in thyristor-based motor controls, light dimmers, and various power supplies.

This component operates by the process of conduction. When in its closed state, the gate is turned on, allowing power to be transferred from the source to the load. When the gate is turned off, it no longer carries any current, thus effectively cutting the power supply to the load. Additionally, the gate can be modulated to control the average current through the semiconductor device, which allows for the regulation of power.

The CQ218-45N is rated for a maximum voltage of 450 volts and a continuous current of 7.8 amperes. It has a temperature rating of 125 degrees Celsius and its operating temperature range is between -55 and +150 degrees Celsius, making it suitable for a wide range of applications.

Applications of CQ218-45N

The CQ218-45N can be used in a variety of applications. It is especially suited for high turn-off speeds, making it a good choice for the switching of high power lamps. Additionally, it is used in motor converter applications, such as the speed control of AC induction or permanent-magnet motors. It is also useful in dimmer applications and in adjustable power supplies.

The CQ218-45N is also useful in applications involving thermal control, such as thermostatic control devices, heat pumps, and temperature controllers. This component can also be used in thermostats, lighting, and other similar applications where it is necessary to regulate the power supply. The CQ218-45N is also ideal for use in high power switching and rectification applications.

Conclusion

The CQ218-45N is a type of surface mount TRIAC that is specifically designed for use in electronic switching and rectification applications. It is a three terminal device, meaning that it can be used to transfer or cut power to a load, modulate the current, or regulate the power supply. The CQ218-45N is rated at a maximum voltage of 450 volts, a continuous current of 7.8 amperes, and a temperature rating of 125 degrees Celsius. It is ideal for applications where high turn-off speeds are required, such as the short-term switching of high power lamps. Additionally, it is also suitable for use in motor converter applications, dimmer applications, and adjustable power supplies.

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