9901-05-20TR Relays

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Reed relays are small electromechanical relays that use an electrically reactive reed switch and an electromagnet to control a circuit. They are widely used in automation and control applications such as electronic test and measurement equipment, telecommunication, computers, and consumer electronics. The 9901-05-20TR is a reed relay that is specifically designed for use in telecom applications.

The 9901-05-20TR has a range of features designed to make it suitable for telephone switching and control. It has a high pull-in voltage of 80 VDC, a maximum contact rating of 10A at 250 VAC and a maximum carry current of 3A. It has two sets of contacts, one normally open and one normally closed, which can be set to operate independently or together for more complex switching operations. The relay also has a single coil with a DC resistance of 3,000 ohms and an inductance of 30 mH. It is a latching type relay, which means that it requires a reset signal to reset the contacts back to their original positions.

The working principle of the 9901-05-20TR is based on the electromagnetic reed switch. It consists of an electromagnet and two thin metal reeds that are sealed in a glass tube. When a current is passed through the electromagnet, the magnetic field causes the reeds to move and close the contacts. When the current is interrupted, the magnet\'s field weaken and the reeds move back to their original positions and the contacts open.

The 9901-05-20TR is a versatile and durable reed relay that can be used in a variety of telecom applications, from switching calls to controlling power supplies. It offers a high contact ratings, low DC resistance, and latching capabilities, making it the perfect choice for telecom operators looking to increase reliability and reduce maintenance costs.

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