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D-Sub, D-shaped connectors are composed of a frame, or “shell” that houses male or female contacts in two, three, or four rows. They also may be equipped with shielding components that reduce electrostatic, radio frequency, and microwave interference. The most recognizable of these is the DB-style connector – with brand names such as DE, DB, DA, or DD – that are used ubiquitously in data and audio applications.

The popularity of the DB-style connector is in part due to its versatile application. Whereas DB connectors are commonly used for connecting PC’s to electric panels or operating systems to digital instrumentation, they are also widely used in audio-visual equipment, telecommunications, and medical applications. Additionally, the device is also utilized in devices used by the US military such as those used in aircraft, tanks, submarines, and ships.

In addition to their various application fields, DB-style connectors also have a unique set of contact configurations that make them an exceptionally reliable connection device. This includes various sizes and configurations, such as the latest 2205 series – which includes but not limited to a removable pin arrangement with integral groundtabs and a patented latching positioning tab. While many of the contacts are sold in through-hole packages, it’s also possible to purchase them in surface-mount or hybrid configurations.

The working principle of this type of connector is relatively simple, as the contacts are designed to operate in a “push-pull” fashion. This is when the push of two contact rows against each other causes the connector to make an electrical connection. To ensure a secure connection is maintained, the contacts of these connectors use an electrical contact crimped onto the mating wires.

In addition to this, the DB-style connector is designed to provide a reliable seal against both dust and oils, as well as various weather conditions, such as humidity and salt-fog. Furthermore, it’s also possible to purchase versions of these connectors that are moisture and watertight, as the connections are sealed by a grommet made from silicone or neoprene. Lastly, these connectors also have excellent vibration resistance.

As a conclusion, DB-style connectors are the favored choice in a wide range of applications, ranging from the US military to audio-visual equipment. Because of their combination of reliable contacts and a secure seal, these connectors can be found in nearly any device that needs an electrical connection. In short, D-Sub, D-Shaped connectors make any application a reliable one.