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D-Sub, D-Shaped Connectors - Accessories are widely used in electrical and electronic industries for electrical connection. Commonly known as D-sub connectors, these accessories are available in various configurations ranging from two- to four-pole configurations. They are used for a wide range of applications such as networking, digital communication, computer systems, and industrial automation.

The main components of a D-Sub, D-Shaped Connector include a metal shell, a mating body, and contacts. The shell provides mechanical strength to the connector, prevents ingress of contaminants, and provides electrical insulation from other components. The mating body attaches the connector to the other components or substrates. The contacts are made of metal and are usually gold or silver coated to provide high electrical conductivity and corrosion protection.

The working principle of D-Sub connectors is based upon electrical conduction. When the plug is connected to its counterpart, it interlocks with the other parts and establishes an electrical connection. The electrical current moves through the contact when the plug is inserted into the receptacle. The contact design along with the material used determines the level of electrical resistance, voltage, and current carrying capacity.

In terms of applications, D-Sub connectors are widely used in a variety of fields, including automotive, aerospace, defense, industrial, medical, and consumer electronics. In the automotive industry, these connectors are used for a variety of functions, such as controlling the flow of fluids, signaling, communications, and more. In the aerospace and defense industry, D-sub connectors are typically used to connect the primary and secondary power systems, navigation systems, communications systems, and more. As for the medical field, these connectors are extensively employed in medical devices, especially in the control and monitoring of vital signs.

In the industrial sector, these connections are widely used in machinery, production lines, and automation systems. As for the consumer electronics industry, D-sub connectors are used in portable devices for audio/visual systems, networking, and so on.

Overall, D-Sub, D-Shaped Connectors - Accessories are essential components for various applications in the electrical and electronics industries. They are designed for robust electrical connections and are available in various configurations with different levels of electrical current and voltage carrying capacity.