MAC15A10

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Thyristors, an important type of semiconductor components, are devices based on the current and voltage dependent control characteristics of four-layer, three-terminal devices. TRIACs are the acronym for "Triode for Alternate Current" and are a three-terminal, four-layer device. The MAC15A10 TRIAC is a popular device used in a variety of applications.

The MAC15A10 is more typically used in AC (alternating current) applications where it can act as a switch or as a regulator and is suitable for general purpose switching and phase control applications. Internally, the device consists of an MT2 to MT1 diode and a main conduction channel formed between MT1 and MT2 terminals by reverse biasing the MT2 terminal with respect to MT1. When a positive going gate signal is applied to the gate terminal G, current flows from the gate to the main terminal MT2 and then to the main terminal MT1. This forward-biased MT2 to MT1 path leads to a rapid turn-on and current flow from MT1 to MT2 in a manner similar to that of a conventional diode.

The trigger point of the MAC15A10 is the voltage at which the device activates from its off state. The MAC15A10 has a VGT of 1.2 V maximum at 25°C. Furthermore, the turn-on time is temperature sensitive. The threshold voltage and temperature coefficient are given as VGTth=1.2V, VGTTC=−0.15%/°C. Therefore, at elevated temperatures, the MAC15A10 will tend to turn on more quickly than at low temperatures.

The MAC15A10 has an off-state holding current of 10mA. The device has a rating of 8A rms at 400V AC and 10A rms at 250V AC with a peak one cycle non-repetitive surge rating of 50A. Since the device is rated at 400V and only 10mA is required to cause the device to turn-on, the dynamic resistance at turn-on is 40KΩ. Maximum leakage current is measured at 5µA in off-state and the device has a Thermal Resistance Junction to Case (Rth(j-c)) of 0.87°C/W.

The MAC15A10 can be used in a variety of applications, due to its ability to turn-on quickly and its relatively low on-state resistance. Commonly, the shutdown and logic functions are provided by the MAC15A10 in light dimmers, speed controllers, and other AC switching applications. When the device is switched off, the current in the load is inhibited. It is also used to provide a faster switching speed than unijunction transistors in rectifier and motor speed control circuits, as well as in tuner circuits and TV circuits.

In addition to its on-off switching capability, the MAC15A10 also has the capability to be used as a regulator. When the device is biased in the reverse blocking mode, the current through the load can be controlled by the voltage applied to the gate terminal of the device. This mode of operation gives rise to the use of the device in applications such as light dimmers, thermostats, power control in smoke detectors, and AC motor speed control. The MAC15A10 is cost-effective and reliable, making it ideal for industrial and consumer applications.

The MAC15A10 is a popular Thyristor used in a variety of applications due to its fast switching, relatively low on-state resistance, and its ability to be used as a switch or as a regulator. The device provides a fast turn-on time and low on-state resistance, making it suitable for general purpose switching and phase control operations. It is widely used in the shutdown and logic functions in light dimmers and other AC switching applications. Due to its cost-effectiveness and reliability, the MAC15A10 is an ideal device for industrial and consumer applications.

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