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D-Sub, D-Shaped Connectors - Contacts

D-shaped sub-type connectors, also known as D-Sub connectors, have been around for decades in the electronics industry and are utilized in both industrial and consumer hardware. These multipin connectors are generally meant for permanent use and because of their distinct shape, are easily identified when appearing in hardware. Standard D-Sub connectors are composed of two pieces; the contact and the shell. In terms of the contact, this part of the connector typically contains several signal contacts that are held together in a row. Some contacts can contain up to 30 assorted pins, depending on the purpose of the connector.

The contact is typically made of a copper alloy that has been plated with a gold finish to increase its corrosion resistance. These contacts, depending on the application, can be in the male form, which has pins, or the female form, which has sockets. Commonly, these pins and sockets are stamped in the raw from the copper alloy and have a sharp leading edge for greater contact surface. The hall, the other part of the D-Sub connector, is composed of a plastic or metal shell that holds the contact components in place. This shell is designed to allow access for the pins and sockets so they can connect with a mating device.

The application of these D-sub connectors is far reaching, as they are being seen across various industries, from automotive to consumer electronics. In terms of the automotive industry, D-subs are popularly used for controlling and accessing engine sensors. They are also used in audio equipment, test equipment, communications systems and computer systems. This wide range of uses is also extended to consumer electronics, with D-subs commonly used as power cords and cables for televisions, games consoles, and printers, among others.

The working principle of these connectors is based on simple mechanical contact. The two pieces are usually held together with screws, allowing for a secure mechanical fit. Nowadays, various manufacturers have released a different range of materials in order to meet the needs of modern industries. This includes contact materials such as Liquid Crystal Polymer (LCP), Aluminum Alloyed (AA), Carbon Steel (CS) and polyamides. As for the shell materials, these often include plastic materials such as LCPSs (Liquid Crystal Polymer Spectacles) and thermoplastic materials such as PAN (Polyhydrazide Acrylonitrile). With the correct contact material and shell material combination, D-subs can be used in highly demanding environments.

In conclusion, D-sub connectors remain popular in a variety of industries, as they are capable of providing secure, reliable connections for a range of applications. The contact materials, in combination with the shell materials, allow for a secure mechanical fit that is reliable, even in harsh conditions. As such, D-subs remain a staple of the electronics industry.

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