Thyristors - TRIACs

A TRIAC, which stands for Triode for Alternating Current, is three-terminal semiconductor switch used in AC circuits for switching and controlling currents. It is basically a combination of two SCRs in an inverse parallel arrangement. They are triggered by a single gate, the output being a bi-directional signal. TRIACs are relatively slow switching devices but are still faster than freely-available mechanical relays so there are many applications where they get used.

T810H-6T application field and working principle

The T810H-6T belongs to the family of TRIACs. It has a working voltage of 800V, a maximum current rating of 10A and a gate trigger current of 8mA. It is suitable for a variety of applications such as general-purpose switching, solenoid and light dimming, motor speed control, AC power control and AC relay control. The T810H-6T is a gate-controlled device used for AC switching and control. It is triggered by the gate current and provides a bi-directional AC switch which can be controlled by a small voltage. The T810H-6T has four main components – the main body, the gate, the upper and lower terminals. The main body consists of two thyristors connected in inverse parallel arrangement; the gate is connected between the two thyristors and can be triggered by a small current. The upper and lower terminals are AC input and output terminals and are used to switch the current in either direction. The T810H-6T has a three-stage working principle. Firstly, the application of positive gate current triggers the main body of the device, causing one thyristor to turn on and the other to turn off. Secondly, when the current switches to negative, the thyristors reverse and the current flows in the other direction. Finally, when the gate current is removed, the device will turn off.

Advantages of use

The T810H-6T offers a number of advantages which make it an ideal choice for many applications. It can be quickly and easily controlled by a small current, making it suitable for use in a variety of devices where space and cost constraints may be an issue. Additionally, the TRIACs have a wide operating temperature range of -40°C to +85°C, making them suitable for use in harsh and extreme environments. The T810H-6T has a low forward voltage of 1.2V and a low recovery time, resulting in a faster switching speed and better overall performance. The device also has a long working life, with a maximum life span of up to 50,000 hours, making it a reliable and robust choice.

Conclusion

The T810H-6T is an ideal choice for many AC switching and control applications. Its small size and low gate current requirements make it suitable for use in a variety of applications and its fast switching speed, wide operating temperature range and long life span offer reliable performance in challenging environments. Its three-stage working principle and ability to switch both AC and DC currents make it a versatile and reliable switch for many applications.