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Triacs, diacs and quadracs

Triacs, diacs and quadracs

In the power control of domestic appliances, electric power tools, dimmers and many other applications, triacs are required as well as thyristors. They can be thought of a double thyristors. However in contrast to them, triacs are suitable for operation in AC circuits. Diacs are similar to diodes in their functionality. They become conductive only once a certain voltage is reached between the two terminals. They function as simple AC switches and are predominantly used in the firing circuits for triacs. Quadracs are relatively new devices. Quadracs incorporate triacs and diacs into a single device, so as to reduce the complexity of circuits.

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