D-Subminiature connectors, commonly known as D-Sub connectors, are electrical connectors used for data and power transmission. They feature a distinctive D-shaped metal shell that provides mechanical support and alignment. These connectors come in various sizes and pin configurations, making them suitable for a wide range of applications, including computers, telecommunications, and industrial equipment. D-Sub connectors are typically available in male and female versions, allowing for secure connections. They are designed to handle multiple signals and can be used for both analog and digital communication. Their durability and versatility make them a popular choice in many electronic devices and systems.