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Barrel – Power Connectors

PJ-075DH-SMT-TR Application Field and Working Principle

Barrel power connectors are widely used in many electronic applications in order to supply power to the components within an electronic system. As a result, they are required to be both reliable and durable throughout the life of the product. The PJ-075DH-SMT-TR is one of the most commonly specified barrel power connectors and due to its unique design, boasts a number of distinctive a-dvantages over its competitors.

Application Field

The PJ-075DH-SMT-TR is mainly designed for powering low power electronic devices, such as cell phones, mp3 players or digital cameras. It is also suitable for use in more complex systems where a small form factor is an important factor in the design, such as those found in medical diagnostic equipment or in consumer electronics.

The connector offers a current rating of 5A and voltage rating of 10 amps. It is able to handle up to a maximum of 2.5kVrms per contact and can operate in temperatures from -40°C to +80°C, making it suitable for outdoor use in a variety of environments and applications.

Working Principle

The working principle of the PJ-075DH-SMT-TR is fairly straightforward. Two mating parts, a barrel plug and a barrel receptacle, are connected by a threaded exterior, to hold the connection together. The barrel receptacle has two spring-loaded contacts (male and female) that are in contact when the components are mated. As the current is passed through the contacts, the electrons from the female contact are drawn towards the male contact, creating an electrical current.

To ensure a robust connection, the barrel plug has two detents which secure the connection by applying an axial force and retaining force, respectively. The detents are precisely made to ensure that the electrical connection is as secure as possible and that the plug will not easily disconnect under load.

In order to further reduce vibration or EMI/RFI interference there is an optional shield can be used with the PJ-075DH-SMT-TR. The shield surrounds the male contact and fits into the threaded exterior, helping to reduce EMI/RFI emissions and providing environmental protection for the electronics within the enclosure.

Conclusion

The PJ-075DH-SMT-TR is a popular barrel power connector in electronics. It offers a number of advantages over its competitors, including a high current rating, a wide operating temperature range and environmental protection via the optional shield. As a result, it is suitable for many applications, from those needing low power supplies, to those requiring more robust connections in higher power applications.

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