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D-sub connectors are a family of connectors that are widely used in a variety of applications, such as computing, multimedia, medical, and military. These connectors are also commonly called "D-shapes". Although they share many of the same features, there are some differences between D-subs. The contacts on D-subs come in two main types: male and female.

Male contacts are typically found on male D-sub connectors. Male contacts are further divided into three main categories: pin, solder cup, and pin/crimp. Pin contacts are the most common type of contact, and are used for most commercial applications. They are typically made from copper alloy and are spring-loaded to ensure a secure connection. Solder cup contacts are also available for use in high-voltage applications. These contacts are made from copper alloys and they come with a cup-shaped design which allows them to be easily soldered into place. Pin/crimp contacts are a blend of both pin and solder cup contacts, as they are designed to be soldered and crimped into place for added strength and flexibility.

Female contacts can be found on either female or combined D-sub connectors. Female contacts typically come in two main categories: pin and socket. Pin contacts are mainly used in commercial applications and are spring-loaded for secure connections. Socket contacts are designed to fit around male contacts, providing an extra layer of protection from dust and dirt.

When it comes to the working principle of D-sub connectors, it is quite simple. In most applications, the male D-sub connector is plugged into the female D-sub connector. This creates an electric connection between the two parts, allowing for data transfer or power to flow. The contacts are used to create the electric connection, and they are held in place with screws or clips.

In conclusion, D-sub connectors are an invaluable tool for any number of applications. They come in a variety of shapes and sizes, and their contacts can be tailored to fit the needs of your particular application. With their simple working principle and reliable connection, they are a popular choice for professionals who need a reliable connection between two parts.

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