CQ218I-40B

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristors - TRIACs are a type of semiconductor components that can be used for the control and measurement of AC or DC power in both manual and automated applications. The CQ218I-40B is a thyristor-TRIAC that is particularly suited to applications involving high current and voltage. The TRIAC has two input terminals, gate and MT1 (Main Terminal 1). It also has two output terminals, MT2 and MT2.

The CQ218I-40B TRIAC is an optically isolated, bidirectional device that can be used in applications ranging from measuring, controlling and switching of AC or DC power with both manual and automated control. It can withstand up to 40A of current and up to 800V of voltage. It is designed in such a way that it can be used in difficult and hazardous applications such as high voltage and high power systems.

The working principle of the CQ218I-40B TRIAC is based on the application of gate charge, which when applied breaks down the silicon dielectric\'s Reverse Blocking Voltage allowing current to flow in one or both directions depending on the level of gate charge applied. The amount of gate charge varies depending on the level of power being applied. When an AC or DC signal is applied from the gate, charge is built up in the device and a conduction path is formed between the MT1, MT2 and MT2 terminals allowing current flow.

When the gate signal is removed, the TRIAC loses its gate charge and current flow is reduced or reversed, depending on the direction of the applied voltage. This is known as the return voltage. When the return voltage is greater than the blocking voltage, the device will remain in a non-conducting state, preventing further current flow. The TRIAC can also be used with an integrated gate driver to improve control reliability and simplify complex control mechanisms.

The CQ218I-40B TRIAC is a popular choice for applications such as motor control, light dimming, automatic relays, switching circuits, capacitive and voltage sensing, as well as temperature and pressure sensing. The device is also suitable for high-voltage and high-power systems for powering and controlling AC or DC loads. The TRIAC can also be used in AC metering and protection systems, as well as in power factor correction.

The CQ218I-40B is a reliable, versatile and cost effective choice for a wide range of applications, as it offers high performance, stability and safety. It is UL approved and offers protection against short circuits, overvoltage, overcurrent and other hazards. The TRIAC is also RoHS compliant, making it an environmentally friendly choice.

The specific data is subject to PDF, and the above content is for reference