BRT21-H

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Optoisolator technology has become increasingly important in the field of power electronics, with the development of more efficient power conversion. Optoisolators that feature triac, thyristor, and SCR output devices are becoming increasingly popular due to their high level of electrical isolation, efficiency, cost effectiveness, and reliability. The BRT21-H is one such optoisolator, designed to provide a high level of electrical isolation and low power consumption. In this article, we will discuss the application field and working principle of the BRT21-H optoisolator.

The BRT21-H is an infrared opto-triac designed for use in industrial and consumer appliances, with high-frequency switching applications. It is specifically designed to provide a reliable electrical isolation between the output driver and the input control circuit. The small package size of the BRT21-H makes it ideal for use in space-constrained designs, such as those found in consumer applications.

The BRT21-H optoisolator is designed to work with a 4-pin DIP input/output port arrangement. It features an on-board sensor, which senses the ambient light and converts it into a signal. This signal is then amplified and passed on to the output driver. The output driver consists of a TRIAC, SCR (Silicon Controlled Rectifier), or a Thyristor, which is capable of operating at high voltage and current levels. These components are isolated from the input signal, providing high electrical isolation of up to 2500Vrms.

The BRT21-H optoisolator has a high turn-on threshold, which allows it to turn on at higher supply voltages and higher power loads than standard optoisolators. The device has a wide operating temperature range and a rugged construction, making it suitable for both indoor and outdoor applications. The BRT21-H is also capable of operating at a wide switching frequency range, allowing it to be used in a variety of applications.

The way the BRT21-H optoisolator works is fairly simple. It starts by sensing the ambient light and converting it into a signal, which is then amplified and passed on to the output driver. It is then activated by the input controls, turning the TRIAC, SCR, or Thyristor output device on and off as needed. The output device remains on until the input signal is removed or until the power is reset.

The BRT21-H optoisolator is an ideal solution for applications which require a high level of electrical isolation and accurate switching. It provides reliability and efficiency at a low cost, making it a popular choice in the market. With its rugged construction and wide operating temperature range, it is also suitable for use in both indoor and outdoor conditions. The BRT21-H is well-suited for industrial and consumer applications, including switching applications with high-power loads, and applications requiring precise voltage control.

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