Q6004F321

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Thyristors, common known as semiconductor switches, are three terminal semiconductor devices, specifically designed to control the high currents and voltages present in many power systems. TRIACs, a form of thyristors, are essentially two SCRs connected in anti-parallel. The Q6004F321 is a family of silicon bidirectional triac switching thyristors, designed and built using the latest technology. The following discussion provides information on the application fields and working principle of the Q6004F321.

Application Fields

The Q6004F321 family of TRIACs are specifically designed for industrial applications where fast switching and high voltage are required. It can be used in a wide range of motor control and power switching applications, such as robotic controllers, dimmers, power controllers, temperature controllers, etc. It is also suitable for use in lighting and heating controls, domestic appliances and other general power applications.

Additionally, the Q6004F321 is also applicable in various communications systems, such as telecommunication, radio/television broadcasting, and navigation/avionics systems. Furthermore, it is used in a variety of industrial control circuits and systems, like circuit breakers and protection relays for motor control.

Working Principle

The Q6004F321 TRIACs operate in 3 different quadrants, which are in accordance with their networks’ switching properties. In the first quadrant, from 0 to g1 (off to turn-on), the current not only turns on but also turns off with a decrease of the control voltage.

In the second quadrant, from g1 to breaker, the current flows greater than the turn-on value and switches off if the externally applied control voltage is less than the current value.

The third quadrant, where the current is greater than the turn-on value, operates in a manner similar to that of the first quadrant. However, the operation in this quadrant is not as smooth as in the first quadrant. Instead, it depends on the externally applied signal, while the turn-off time is determined by the current and the magnitude of the externally applied voltage.

The opening of the current path is mainly achieved by the two p-n junctions, which act as a multi-directional switch. When a voltage is applied across the two junctions, a current flows through them and creates an electric field, which causes the conduction of current. The turn-on and turn-off process is controlled by the current through the two junctions. The Q6004F321 TRIACs are designed with regenerative action, which results in very fast breakover.

The temperature ranges of the Q6004F321 TRIACs from -40 degrees Celsius to 125 degrees Celsius, while the peak repetitive off-state voltage range is 8V to 1000V. The peak repetitive on-state current ranges from 2A to 10A. It has a wide range of breakdown voltages, which is between 800 to 850V.

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