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D-sub, or D-shaped, connectors are a type of electrical connector that has a D-shaped metal shield and multiple contacts used for computer systems, data interfaces, telecom devices, and power connections. The D-shaped contacts allow for more electrical current to pass through than other types of connectors. Since they are designed for use in industrial and commercial applications, they are more durable and reliable than other types of connectors.The D-sub connectors are typically divided into two categories: the plug and the socket. The plug is the male connector that is inserted into the female socket on the other device. In many cases, these two connectors are threaded together to provide an enhanced, secure connection.The most common type of D-sub connectors are the ones with a rectangular or cube-shaped metal backshell. These are commonly used in industrial and commercial applications where a higher current rating is necessary. The backshells protect the connectors from outside environmental factors. They are also designed to provide a secure connection as well as EMI shielding.Another popular type of D-sub connector is the hood or casing. This type of connector is often used for computer or telecom applications. The hood or casing covers the electrical contacts and provides additional protection from environmental elements. The hood first clips over the backshell and then attaches to the device.Depending on the application, some D-sub connectors are designed with an ISO 9141-2 and CAN bus interface. This type of connector is typically found in automotive diagnostic applications and is specifically designed to meet the specific requirements of the CAN and other automotive diagnostic devices.D-sub connectors can be found in a variety of sizes and configurations. Miniature D-sub connectors generally have 9, 15, or 25 contacts and are usually used in low-powered communication systems. Standard D-sub connectors, on the other hand, have larger contact-pins and can be used in a variety of applications.No matter what type of D-sub connector is used, they all share the same basic working principle. The D-shaped casing and the backshell provide the necessary electrical grounding for the device and contacts. This ensures a reliable and safe connection. The contacts are made from metal pins or wires and are designed to maintain contact with the device’s electrical connections.D-sub connectors are one of the most common types of connector used in electrical and electronic applications. They are reliable, durable, and provide secure connections for even the most demanding applications.