ACS108-8SA-AP

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Thyristors are mainly used as AC switches and opening and closing circuits in power systems. Thyristors can be divided into two types: unidirectional thyristors (SCR) and bidirectional thyristors (TRIAC). Unidirectional thyristors can control unidirectional current. The bi-directional thyristor (TRIAC) is the most common type of thyristor and is mainly used for AC circuit control. TRIAC is a three-terminal semiconductor switch.Its main feature is that it can control current bidirectionally

ACS108-8SA-AP is a type of thyristor-TRIAC with an 8A peak current rating and 800V voltage rating. It is mainly used for controlling the sine wave AC current in power grid, lighting and energy saving control systems. It is an integrated triac control device with adjustable zero-crossing detector, which can improve the control accuracy of AC voltage better. It can be used in home/commercial/industrial lighting, consumer electronics and factory automation, etc.

The ACS108-8SA-AP is composed of two transistors and a resistive voltage divider, including a triac and a zero-crossing circuits. It has three terminals, MT1, MT2, and SCK. The two terminals MT1 and MT2 are connected in series between the power stage and the load and the switching action is provided by the triac portion. The third terminal SCK is connected to the zero-crossing circuit and enables the control of the switching of the triac.

The working principle of the ACS108-8SA-AP is as follows. After it is powered on, the zero-crossing circuit detects the zero-crossing point of the AC sine wave and then outputs a zero-crossing signal through the gate. When the gate receives the signal, the current conduction of the triac starts and controls the current according to the voltage applied to the terminal SCK. The intensity of the current conducted by the triac can be adjusted by changing the voltage applied to SCK terminal. When the AC wave reaches its zero-crossing point on its next half cycle, the current conduction is reversed and thus the AC current is switched off.

The ACS108-8SA-AP is a very useful triac and is widely used in home appliances, such as air conditioners, heaters, and fans for speed regulation and temperature control. It is also used in industrial applications for motor speed control, light dimming, lighting control and factory automation, etc. It has a wide range of applications in various industries due to its high current rating, controllable switching frequency, and functional features.

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