AGQ20T03

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Signal relays are popular devices used to solve power issues involving small currents up to 2 amps, such as in broadcasting systems, telephone exchanges, and healthcare monitoring. AGQ20T03 is one of the most widely used options. This article examines its application field and working principle.

Overview of AGQ20T03

AGQ20T03 is a 10A signal relay that can switch both AC and DC current, meaning it can be used in both conventional and specialized applications, from telecom to HVAC systems. It is DIN Track mounted, with a wide operating temperature and a 1KV input voltage, and is highly reliable (with a lifetime of more than 3 million operations). Furthermore, it has an ultra-slim design, making it possible for manufacturers to fit it into ever-shrinking designs.

Application Field

Due to its size, AGQ20T03 is mostly used in compact applications, such as in reclosers, remote protection devices, and master program controllers. It is also commonly used in buildings with various automation systems as well as automotive installations, where its small footprint is highly beneficial. AGQ20T03 is also used in audio and video broadcasting, as it can switch up to 10A current with minimal internal losses.

Working Principle

AGQ20T03 is a two-coil, two-pole device. It works when a current is applied to the input coil, which creates an electromagnetic field. This field moves two contacts away from each other and closes the circuit on the output coil. This process is dependent on both the input current as well as the resistance of the output circuit, and can be turned off by reversing the process.

When the input current is greater than the necessary amount to maintain the output voltage, the relay will dissipate the excess energy. The coil will heat up, and when the temperature reaches a certain threshold (often 130 degrees Celsius for AGQ20T03), a built-in thermal detector automatically opens the contacts and turns off the relay.

Conclusion

AGQ20T03 is a highly reliable signal relay that is capable of switching up to 10A AC or DC current. It is best used in a variety of applications, such as telecom, HVAC systems, and in audio and video broadcasting systems. Its working principle relies on the input current creating an electromagnetic field that moves the contacts away from each other and closes the output circuit. If the input current is too high, the thermal detector will open the contacts and turn off the relay, preventing damage or further energy losses.

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