K3020PG

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Optoisolators consist of one or more optically coupled or isolated input sections and one or more electrically isolated output section, which provide a degree of electrical isolation up to 2500 V equivalently. K3020PG is an optoisolator which can be classified into Triac, SCR Output type. In this article, the application field and working principle of K3020PG will be discussed.

K3020PG is a DC input phototriac coupler and built in zero cross detect circuit that consists of gallium arsenide infrared emitting diode and a four-quadrant bidirectional triac (GTO) as the output rated 1.5A at 500V. Its minimum operating current is 1mA and its trigger intensity is 10 mA. It uses an integrated optical isolation system that isolates the input from the output and provides a high degree of electrical insulation. The output can be set for AC, DC, or pulse operation. It has an operating temperature range of -25-80 °C, and a storage temperature range of -30-100°C.

K3020PG is designed for a wide range of applications, including AC and DC control circuits, motor speed control, pulse motor control, voltage regulating, switching systems, and lighting control. They are often used in industrial automation, energy savings, and electronic monitoring. For example, in AC motor speed control, they can be used for controlling the speed of an AC motor by adjusting the frequency of the input current. The input signal is optically isolated from the output signal, therefore, any interference between the input and output will be prevented.

The working principle of K3020PG is based on the opto-isolator principle. A LED with a photopic diode is used to transfer an electrical signal from the input section to the output section, providing isolation between the input and output signal. The input signal will trigger the LED which will in turn generate a light beam that will be detected by the phototriac. This will trigger the output Triac or SCR in the output section, providing a low voltage output that can be used to operate the motor or any other desired device. The output current can be adjusted by varying the input voltage.

In conclusion, K3020PG is an optoisolator that can be used for a wide range of applications, including motor speed control, pulse motor control, voltage regulating, switching systems and lighting control. It works by transferring an electrical signal through an optically isolated LED and phototriac diode, providing a low voltage output that can be used to operate the motor or other device. Its features include an operating temperature range of -25-80°C, a storage temperature range of -30-100°C, and a minimum operating current of 1mA.

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