MAC97A8

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Thyristors - TRIACs - MAC97A8 Application Field and Working Principle

The MAC97A8 is a three terminal semiconductor device known for its use in AC control applications such as lamp dimmers and motor speed control. It is often referred to as a TRIAC, which stands for “Triode for Alternating Current”. The MAC97A8 is part of a class of components called thyristors, which are three or more terminal devices that are designed to switch in the presence of an electric signal.

Characteristics

The MAC97A8 has a gate-Trigger current of 1mA and a minimum Secure Trigger Gate Current of 5mA. It is also capable of a blocking voltage of 600 volts with a gate trigger voltage no higher than 1.5 volts. The package for the device is available in a three-pin TO-220 ROHS Compliant package. The MAC97A8 also has a maximum off-state current of 1mA and a maximum holding current of 10mA.

Power Handling

The MAC97A8 can handle up to 2.5A resistive loads at temperatures as low as zero degrees Centigrade and as high as one hundred and twenty-five degrees Centigrade. It also has a maximum quadrant gate trigger current of 150mA. The device can be safely operated up to 10A at 25 degrees Centigrade.

Application Fields

The MAC97A8 is a popular choice for controlling lighting in residential and commercial applications. It can be used in a variety of applications including AC motor speed control, lamp dimmers, fan speed controllers, electric lock control, and motor contactors. Its popularity is due in large part to its reliable performance and low cost.

Working Principle

The MAC97A8 is a thyristor made up of three electrodes: an anode, cathode, and gate. When the gate voltage is below the breakover voltage of one diode, the current between the anode and cathode is blocked, preventing the current from flowing. When the gate voltage is above the breakover voltage of one diode, the current is allowed to flow between the anode and cathode. When the gate voltage is above the breakover voltage of both diodes, the thyristor will turn on, allowing current to flow between the anode and cathode.

The MAC97A8 is designed with a special gate drive circuit that allows it to turn on with a minimum of 6mA secure gate trigger current. This makes the device ideal for applications that require reliable, low-power operation. The device can also be turned off with a secure gate current much lower than the 6mA required to turn it on.

The MAC97A8 is an economical, reliable device for controlling equipment in a variety of AC control applications. It is easy to use, has low power consumption, and is reliable under a variety of operating conditions. The device can handle up to 2.5A resistive loads and can withstand temperatures as low as zero degrees Centigrade and as high as one hundred and twenty-five degrees Centigrade. It is a popular choice for residential and commercial applications.

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