Q8008DH3

Thyristors - TRIACs are widely used in power electronics, with many uses in home appliances and industrial applications.

The Q8008DH3 is a three-terminal, bipolar, 400V, 8A, phase-control thyristor (TRIAC). It is designed for enhanced phase-control circuit applications, such as phase-angle controllers, phase-angle dimmers, AC switches and power supplies.

The Q8008DH3 is a three-terminal integrated device that consists of two thyristors in inverse parallel configuration. It has a high turn-on voltage, low gate trigger current and thermal stability. It has an old double-back resistance that is much lower than most thyristors, making it preferable for square-wave applications.

The main application field of the Q8008DH3 is in general-purpose phase-control circuits where it can be used as a switch or dimmer. It is also suitable for applications in power supplies, such as AC converters and dimmer-controlled converters.

The working principle of the Q8008DH3 is based on the principles of operation of thyristors. When triggered by a gate signal, it can be commutated to a conducting state (on). A control signal, normally an alternating current or voltage, is used for controlling the gate current by forming a feedback between the gate signal and the main current. In this mode, the Q8008DH3 can be used as either a switch or a dimmer, depending on the type of application.

In dimmer applications, the Q8008DH3 can be used with a variable supply voltage, which is then adjusted by the user to control the power consumed by the device. This allows the user to control the speed and intensity of the light output, making it ideal for lighting applications.

The Q8008DH3 is a useful device in a wide range of applications such as phase-control circuits, AC switches, power supplies, dimmers and converters. It is a three-terminal, bipolar phase-control thyristor that has a high turn-on voltage, low gate trigger current and thermal stability. It has an old double-back resistance that is much lower than most thyristors, making it preferable for square-wave applications.