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D-Subminiature connectors are also commonly referred to as D-subs, D-shaped connectors or just D-connectors. This type of connector features a ‘D’ shape that allows the rearrangement of pins within the connector barrel to suit application needs. Commonly constructed of insulators, a backshell and a hood, D-Sub connectors are available in both male and female gender forms.

The application field of D-Sub connectors is quite vast, spanning from computer, telecommunications and instrumentation to equipment testing and medical use. Commonly used in a variety of industries, they are specifically designed to meet a great number of technical requirements.

Backshells

The backshell is the term to describe the plastic or metal shield that covers the rear of the D-sub connector where the individual contacts are housed. It is generally the portion of the D-sub connector that houses the strain relief feature, which helps protect the cable and prevents accidental loosening of the mating device. While the backshell may offer certain additional features such as mounting hardware, the main purpose of the backshell is strain relief.

Hoods

The hood is the metal shell which attaches to the backshell and can be plugged into a panel or bulkhead. It contains the D-sub connector in the panel opening and the mating fingers, which provide the contact between the male and female connector. It provides mechanical protection as well as a grounding interface between the connectors.

Working Principle

The basic concept of the electrical system of D-Sub connectors is simple. They consist of two vertical contacts that mate in an overlapping, slanted fashion. Each contact has two ends, a power contact and a ground contact, which create a line of conductive path across the connector. When the cable is connected to the connectors, the entire line of conductive path is completed, allowing power or ground contact to pass across. For example, if the male connector contains a power line and a ground line, and the female connector contains an inductor and a ground line, the lines will complete the circuit and connect the two devices.

The hood of the D-Sub connector creates a seal between the two connectors when the cable is connected. The hood helps protect the contacts from the elements by preventing dust, moisture, and other particles from entering the connector. It also provides a ground connection between the two connectors, ensuring a safe and reliable connection.

The D-Sub connector is an efficient and durable connector used in many industries, particularly in electrical systems where a reliable and weatherproof connection is necessary. With its easy installation and strong build, it is an ideal solution for any type of electrical connection. The versatility of the D-Sub connector makes it suitable for a wide variety of applications.

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