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The D-subminiature connector, also known as the D-sub connector, is a common type of electrical connector used in computer brackets, chassis, and boards. It was first developed in 1950 and is now widely used in industrial controls, including data processing, office automation, printers, data networking, and more. The D-sub connector is also used in a wide range of applications including consumer devices, audio/video devices, telecommunications, automotive electronics, and even medical products. The connector’s design is characterized by its ease of use, high-density contacts, and reliable connection. 

The D-sub connector consists of two parts: the pin side, which contains a group of pins that connect to a PCB, and the socket side, which contains a group of sockets that connect to a cable. The pins are typically arranged in two rows with male pins and female sockets. It is also possible to have a pin side with male and female sockets, or vice versa. 

The D-sub connector is available in standard sizes from 9 to 64 pins, along with a variety of sizes for mini, micro, heavy-duty, and military applications. The connector’s pin spacing is typically 0.050 inches (1.27 mm) on larger sizes with smaller sizes using either 0.030 inches (0.762 mm) or 0.025 inches (0.635 mm) measurements. 

The D-sub connector’s contact arrangement is fully specified in the ANSI/IEC 603-2 standard. This standard defines the pin spacing, contact force required for insertion and removal, the number of contacts, and maximum current load ratings. It also defines a range of standards for contact material and plating, insulation properties, and overall mechanical strength and contact resistance specifications. 

The D-sub connector is typically made from metals such as zinc, aluminum, steel, brass, and copper, though it may also be made from other materials such as polyamide and polystyrene. The connector is usually protected from corrosion by a metallic finish, such as anodizing or zinc plating. The pins and sockets are typically made from phosphor bronze. 

The D-sub connector is mainly rated by the number of pins. It is also rated by additional parameters, such as temperature rating, current rating, and voltage rating. The current rating of the connector is usually 4A to 5A for small sizes, and up to 20A for larger sizes. The voltage rating is usually 250VAC or 400VDC. 

The D-sub connector offers a reliable electrical connection with high-density contacts. It is a cost-effective connector solution for a wide range of applications and can provide an improved signal transmission as compared to other types of connectors. As a result, the connector is popular in various industries and is used in many consumer, industrial, and commercial applications. 

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