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HE721C2420 Application Field and Working Principle of Reed Relays

Reed relays are among the earliest electromechanical switches invented, they are used to control a variety of electronic functions. The HE721C2420 is a high-performance reed relay that is widely used in industry.

Application Field

The HE721C2420 reed relay is used in a variety of applications, including power switching, communications, industrial control, manufacturing, and telecommunications. In power applications, it is used as a control component in electrical circuits, and as a power switch in circuits such as inverters and rectifiers. In communications, it is used as an on/off switch for digital devices, and as a data line relay for telecommunication systems. In industrial control, it is employed to switch electrical connections in industrial machines, and can be used to control pumps, motors, and even automatic shutoff valves. In manufacturing, it is used to control various production processes, and in telecommunications, it is used to switch power between different network elements.

Working Principle

The HE721C2420 reed relay is a form of electromechanical switch that consists of two contacts, a set of coils and a sliding contact, usually mounted on a spring. The coils generate a magnetic field which attracts the sliding contact, causing it to slide and make contact with the two contacts. When the current is removed from the coils, the spring returns the sliding contact to its original position, opening the contacts.

The advantages of reed relays compared to traditional mechanical switches lie in their small size, ruggedness and low cost. They are also very reliable, with a long life expectancy. The HE721C2420 reed relay is capable of switching currents up to 200 mA, and is available with a variety of contact forms and contact ratings.

Conclusion

The HE721C2420 reed relay is a highly reliable, rugged, and low cost switch that is used in a wide variety of applications. It\'s small size and high switching current make it ideal for use in power, communications, industrial control, manufacturing, and telecommunications.

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