Q6025L656

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Thyristors - TRIACs are electronic components used to control the flow of electrical current, often referred to as triode AC switches due to their 3-terminal configuration. The Q6025L656 is a two quadrant, single phase TRIAC, making it suitable for most applications where the electrical load is AC.

The Q6025L656 is an example of a ‘sensitive gate’ TRIAC, meaning that it can be triggered into conduction with a light-touch from the trigger gate, unlike some mains-connected TRIACs which require a higher voltage to start or ‘fire’. This is because, unlike other TRIACs, the Q6025L656 contains an auxiliary trigger mechanism which allows for the start of conduction with a lower voltage than usual.

The application field of the Q6025L656 is mainly found in AC circuits, such as motor control and lighting systems, as well as home appliances, power tools, and power supplies. In such applications, the TRIAC can be used to control the power delivery to the load without interfering with the source. In motor control, the TRIAC can be used to regulate the speed, start and stop the motor, as well as reverse its direction.

The working principles of TRIACs, such as the Q6025L656, are quite simple. The TRIAC can be thought of as two SCRs connected in parallel in the opposite direction, with a gate control on each SCR. The gate controls when the SCR switches can be either closed or open, depending on the polarity of the voltage applied to the gate.

When a positive voltage is applied to the gate of the first SCR, the current starts flowing, causing the current to flow in both directions as the SCR turns on, creating a low-resistance path for current in both directions. As the voltage across the SCR reaches a certain level, the SCR turns off, thus breaking the connection.

The second SCR operates similarly but with the opposite polarity and switches on when a negative voltage is applied to its gate. By controlling the voltage applied to each gate, the TRIAC can be used to systematically control the flow of current in both directions.

The Q6025L656 is an ideal choice for most AC circuits as it is capable of handling up to 25A and is available in both standard and special configurations, such as those required in special motor control applications. It is also suitable for applications where high current control is needed, and is used in industrial and consumer goods applications, as well as home automation systems.

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