T405-800B-TR Discrete Semiconductor Products

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Thyristors - TRIACs are a type of semiconductor component suitable for switching electric current in both directions. The T405-800B-TR is a member of the Thyristor family, specifically a TRIAC – from triode for alternating current – which functions as an AC switch. This device has a range of applications, including in motor controls, washing machines, and electric lamps. In this article, its working principle and possible applications will be discussed.

Working Principle

The T405-800B-TR is an off-state bidirectional device, meaning that current can flow through the device from either polarity. As with other TRIACs, the device will remain non-conductive until a minimum gate current is applied. This is used to trigger the device and cause it to conduct, enabling power to flow through it. In order to shut off the TRIAC, the current through it must be reduced below its holding current threshold. The device is then able to be triggered again with a minimum gate current.

The T405-800B-TR is available in three power variants, with options rated at 4, 8 and 12 amps. The device is also capable of handling voltages up to 800V. The device features an insulated case with leadless construction, meaning that it is well suited to surface mount applications. It additionally has low thermal characteristics, and is certified for use in harsh working environment.

Applications

The T405-800B-TR is used in a variety of applications, particularly those involving AC power control. In motor controls, it is used to regulate the speed of AC motors, as it enables varying levels of voltage and current to be applied. Its low thermal characteristics make it ideal for motor control applications, where the device may be subject to periods of high currents.

The device is also used in a range of household appliances, such as washing machines and electric lamps. In these applications, the component is employed to switch the appliance on and off. Its low gate current threshold and long holding time make it particularly suitable for this purpose. These features are also beneficial in applications where regular switching is of importance.

The T405-800B-TR is also used in a variety of industrial applications. Its simple operation, low maintenance requirements and small size are beneficial, and it has seen use in varying industrial applications, including process control and power distribution.

Conclusion

The T405-800B-TR is a TRIAC capable of switching electric current in both directions. It features insulated construction and low thermal characteristics, making it suited to a range of applications. This includes motor control, switching of household appliances, and process control and power distribution. The wide compatibility and low maintenance requirements make the device a reliable option in these contexts.

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