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D-Sub connectors are an important type of cabling components used to interconnect two or more devices. The D-Sub connector family consists of a large range of connector designs that are versatile, reliable, and cost effective, with a variety of application fields and working principles.

D-Sub connectors are commonly used in computer and consumer electronics applications, and are available in a wide range of sizes, shapes, and configurations, including straight, 90 degree, and custom bend configurations. This design versatility makes them ideal for a broad range of applications including audio/video, printing and automotive wiring. The most common D-Sub connector configurations are 9-pin and 15-pin, with variations of these sizes also available.

The D-Sub connector family is also available with various contact material options, including brass, copper, and aluminum, with gold or tin plating available. This allows for the user to select the most appropriate material and contact plating depending on the application requirements. The contact terminations are designed into the D-Sub connector’s pair of metal shells which consist of an outer-shell and an inner-shell, also known as contact benches, which hold the contacts and maintain electrical continuity between all contacts.

The outer-shell and the inner-shell not only provide a physical connection between cables, but also offer additional strength and environmental protection for the onboard contacts in the most rugged applications. The inner-shell and outer-shell are mated together with a threaded locking ring, while the contacts are retained in place with a stainless steel throw-off clip

The working principle of a D-Sub connector is based on electrical contact between two mating parts which is transferred from the male D-Sub connector to the female D-Sub connector through the contacts. The contact points of the male and female connectors are designed to accommodate a variety of contact forms such as flat blades, circular pins, plated tapers, or insulation displacement contacts, each with their own very specific working principles.

The electrical contact is usually established by means of a specialized contact shape, such as a flat blade contact, circular pin, plated tapered tip, or insulation displacement contact. The contact shape determines the type of contact as well as the electrical path established. In addition, the connection between the connectors must be mechanically secure in order for the connection to remain intact throughout the life of the system.

To ensure a reliable connection, the contacts of the D-Sub connectors consist of quality electrical contact materials, such as silver and gold plated brass and copper, with contact plating thicknesses ranging from 0.10 to 0.75 mils. An optional backshell can further improve the connection’s reliability, and can also protect the contacts from corrosion. This is especially true for applications exposed to high humidity or outside environmental conditions.

D-Sub connectors are a reliable and cost effective solution for interconnecting two or more devices. With their wide range of sizes, shapes, configurations, materials, and contact plating options, as well as their robust design and working principles, D-Sub connectors can meet the needs of an extensive range of applications.

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