CTB24-1200BWPT

Thyristors - TRIACs

The CTB24-1200BWPT is a thyristor in the TRIAC family. It is a bidirectional Silicon control switch that features high input sensitivity, high switching capability and robust design for power line applications. It is an ideal choice for lightning protection and overvoltage protection, as well as dimming and automated switching applications.

Application field

The CTB24-1200BWPT is suitable for over voltage and over current protection in communication, information and control systems. It is ideal for lightning protection and overvoltage protection of LED, LED Tube and LED panel products. It can also be used in high power switch mode power supplies, motor control and automated switching applications.

Working principle

The CTB24-1200BWPT consists of two bidirectional thyristors configured in inverse parallel that can be activated separately or simultaneously. When the device is triggered, it will turn on one of the thyristors as a switch, which will close the circuit and allow current to pass. When the current is interrupted, the thyristors will be turned off and the circuit will be opened. The thyristors can also be triggered separately, allowing for more complex control.

The device works in two states when operated in the BI-DIR mode: conducting or not conducting. When the input voltage exceeds the "on" threshold, the output voltage will rise, triggering the thyristors and allowing current to flow through the circuit. When the input voltage drops below the "off" threshold, the thyristors will turn off, opening the circuit and preventing current from flowing.

When the device is operated in the TRIAC mode, it works in three states: conducting, non-conducting, and half conducting. In this mode, the device can be triggered on both sides of the AC waveform. When the current reaches the “on” level, the thyristors will turn on and allow current to flow through the circuit. When the current drops below the “off” level, the thyristors will turn off, opening the circuit and preventing current from flowing. When the current is between the “on” and “off” levels, the thyristors will be in a half conducting state and allow current to flow, but not at its full capacity.

Conclusion

The CTB24-1200BWPT is a bidirectional thyristor in the TRIAC family, making it an ideal choice for lightning protection and overvoltage protection, as well as dimming and automated switching applications. It consists of two bidirectional thyristors configured in inverse parallel that can be operated in either the BI-DIR or TRIAC modes, allowing for more complex control. When the device is triggered, it will close the circuit and allow current to pass, and when the input voltage drops below the “off” threshold, the thyristors will turn off, opening the circuit and preventing current from flowing.