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D-Sub, D-Shaped Connectors - Contacts

D-Sub contacts are a type of electrical connector used in a variety of applications to provide an electrical connection between two or more electrical components. The most popular and common type of D-Sub connector is the D-Subminiature, which is an example of one of the D-Sub connector family of connecting and disconnecting electrical conduit. This type is used in most of the consumer electronics (CE) and electrical markets, such as automotive, entertainment, medical, military, office and recreation equipment. It is also used in the industrial sector, such as electronics assembly, telecom, power supplies and instrumentation.

D-Subs are generally identified by the number of pins or the size of their pin pitch. The pitch is the center-to-center measurement between two adjacent pins. A two pin, 1.25 mm pitch, D-Sub contact has a connector size of 2P or 2S for pins or sockets, respectively. Depending on the design and orientation, the pins may either be straight or angled down.

In some types of D-Sub connectors, the contacts are inserted into the housing and then secured using crimp or solder techniques. Crimping is generally preferred for smaller contacts and solder is used for larger connectors. Eventually, an insulator piece or the outer shell completes the assembly. This design provides a secure and reliable connection, and is resilient to electromagnetic interference.

A variety of materials and contact plating options are offered to meet industry compatible and corrosion-resistant requirements for different applications. Common contact materials include brass or phosphor bronze with gold, silver or tin contact plating. Other metals with different combinations of plating materials can be used for certain applications such as automotive, military and aerospace.

The contact construction allows for a variety of working principles, such as solder, crimp, woven or idler pins, as well as other combinations that may vary depending on the application. Woven contacts feature a threaded construction that increases contact reliability and provides a secure connection. Idler pins are used to provide extra contact security, especially in high-vibration and high-current applications. They are soldered to the inner wall of the contact for secure bonding and provide additional contact points.

Although D-Sub connectors are typically used as a wire-to-board connection, the contacts can also be terminated at an edge for use with wire-to-wire applications. Terminating is an important process that involves the secure assembly of contact points, insulators, contact protection covers and shells. Insulators, for example, serve to electrically isolate and mechanically secure the contact.

D-Sub connectors are an ideal choice in applications when a secure, reliable solution is required to link two or more components together. Not only does this connector offer a wide range of size and specification options, but it also boasts the durability and flexibility to fulfill a variety of other interconnect needs.

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