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Thyristors - TRIACs

The QK015N5TP is a (TRIAC) Thyristor module made by XinKa electro. It is a 3-in-1 package that houses three field effect transistors (FET). TRIACs are three-terminal devices, where one terminal is the control terminal, one the gate terminal, and one the main current path terminal, constructed from a series of four layers of alternate n-type and p-type semiconductor materials. This Thyristor is used as an electronic switch and is able to interrupt any current of up to 15 A with a breakdown voltage of 800V.

Application Field

The QK015N5TP Thyristor is typically used in power electronic switches, primarily in linear and switching power supply, motor control, lamp control, industrial automation machinery, AC home appliances such as air conditioning, washing machine, electric oven, microwave oven, lighting and so on.

Working Principle

TRIACs are three-terminal thyristors and operate by forming a bridge between the gate and main terminals. This involves the formation of a conducting channel between the anode and the gate terminal, which can be done by biasing the gate terminal in the forward direction. This will cause a depletion region to form between the gate and the anode, thereby creating a conducting path. If the TRIAC is reverse-biased, no conducting path will be created and the device will remain off. When the TRIAC is biased in the forward direction, a current will flow through the device and the TRIAC will remain on until the current drops below a certain threshold. TRIACs can be used to control the flow of AC or DC current, depending on the application.

The QK015N5TP also has a temperature cut off feature that helps to protect the device from overheating and prevents damage. When the temperature reaches a certain threshold, the transistors will turn off, thus preventing any further damage to the device. This feature can be reset by a manual reset switch after the device has cooled down.

Conclusion

In conclusion, the QK015N5TP is a three-terminal TRIAC thyristor module used as an electronic switch in a range of power electronic applications. It has a high current rating of up to 15 A, a breakdown voltage of 800 V, and a temperature cut off feature to help protect it from overheating.

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