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D-Sub, D-Shaped Connectors - Contacts are electrical connectors used to join two or more cables, allowing for transfer of electricity and information. They are typically used in medical, aerospace, and military applications. The D-Sub connector is sometimes referred to as a "D-shaped" connector, as it has a rectangular body with two symmetrical halves that resemble an inverted letter "D".

D-Sub connectors are designed to slide onto contacts that are embedded into a printed circuit board (PCB) or a panel. The two sides of the connector fit together securely, providing a high level of connection accuracy and reliability. On one side, the contacts (usually made of metal or conductive material) are arranged in a D-shape beneath the contact carrier. On the other side, a matching number of square or rectangular pads are arranged on the PCB, with each one being connected to an individual contact in the carrier.

D-Sub connectors come in a variety of sizes and contact arrangements, allowing for a wide range of applications. Some of the most common types of D-Sub connectors are 9-pin, 15-pin, 25-pin, 37-pin and 50-pin. Each size will have a different number of contacts, with the highest being 50. Depending on the requirements of the application, these connectors can be used in two ways: either as a simple two-pin connection or as a more complex multi-pin connector.

The working principle of a D-Sub connector is simple: when plugged in, the contact pins on the two halves of the connector interlock, and each contact is electricially connected to its corresponding contact point on the PCB. This process ensures that the contact remains secure when connected, and the electrical conncetion is reliable.

D-Sub connectors have numerous advantages over their traditional counterparts, including increased space utilization, reduced weight and cost savings. In addition, because the contacts are Mates in seconds, and the connectors typically have a high contact density, they are more reliable than other types of connectors.

D-Sub connectors are increasingly being used in a wide range of applications, from consumer electronics to industrial machinery. With its reliable connection and flexible configuration, it is becoming an increasingly common choice for designers who need to establish an efficient and reliable connection.

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