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D-Sub, D-Shaped Connectors - Contacts, also called D-Sub connectors are a type of electrical connector used in a variety of applications. The contacts are used to make electrical and electronic connections between circuits, components, and systems. These connectors are most commonly used in the telecommunications, computer, and automotive industries.

The name D-sub is derived from the shape of the contacts, which are typically curved in a “D-shape” and are seated in a correspondingly shaped contact shell. The connectors come in several versions that differ in size and type of contact, such as pin, socket, coaxial, and ribbon. The contacts can accommodate any combination of current characteristics, such as low voltage, low current, and high current applications. The contacts are made from metals such as copper, gold, nickel, and tin, and can be plated to meet specific requirements.

The working principle of a D-sub connector involves the electrical connection between two terminals, one in the connector and the other in the mating part, that is, the counterpart connector or circuit board. The terminals are usually contacts, and when connected, a electrical current is transferred across the connection.

A typical D-sub connector consists of two or more contact pins within an insulating housing or shell connected to a conductor, usually a ribbon or wire. The contact pins are usually formed in a “D-shape” to form a contact seat, with each pin representing a common data pin or signal pin. The contact pin is inserted and secured in the connector to allow for electrical contact between the mating parts.

The contacts are surrounded by a molded insulation or contact shell, providing electrical insulation and also acting as a shield for the connector assembly. The contact shell is attached to the wire or ribbon conductor and is generally designed to accept the connection from the mating part. The contact shell can be made of materials such as plastics, metals, and composites, depending on the application. It also serves to protect the connector from the electrical environment.

D-sub connectors are used in many different industries, including automotive, telecommunications, computers, routers and modems, networking, and consumer electronics. These connectors are suitable for applications requiring tight electric couplings and high contact density. They are also used in the medical, instrumentation, and military industries.

D-sub connectors are highly customizable and have a wide range of features to address customer requirements. They are available in different sizes and shapes, as well as various contact configurations. Many of these connectors are available in both shielded and unshielded versions, as well as in a variety of contact materials and plating options.

In conclusion, D-Sub connectors are an essential part of many industries, as they provide reliable, secure connections between components. They are available in many different shapes and sizes, as well as a variety of contact materials and plating options. The working principle of a D-sub connector involves the electrical connection between two terminals, which are typically contacts, and when connected a electrical current is transferred across the connection.

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