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D-Sub connectors have found wide application in the communication, computer, industrial, instrumentation and aerospace markets in the form of audio, video, and data interconnections. Sometimes referred to as “D-Subminiature” connectors, D-Sub connectors are commonly used to interface computers, peripherals, and test equipment.

D-Sub connectors are available in both 2 and 3 row arrangements with a variety of connector pin counts. Multiple shell sizes are available to accommodate specific wiring configurations and board space restrictions. Shell sizes range from 9 to 50 pins and provide an option for almost any type of connector assembly.

The most common types of D-Sub connectors are DB-9, DB-15, and DB-25. DB-9 connectors contain nine pins and are used for parallel printer connections. DB-15 connectors contain fifteen pins and are commonly used for video port connections. Finally, DB-25 connectors are the most common and contain 25 pins. They are typically used for various types of serial connections.

The terminals of D-Sub connectors are typically a pin or socket contact. Each contact typically has a machined pin, stamped with panel mounting pins or rivets. The insulators are made of PBT, PPS, or plastic and often contain holes for PCB soldering. The finish of the contacts is typically gold, silver, or tin.

The contact layout of D-Sub connectors is based on the international standard IEC 61076-1. The profile is usuallytrapezoidal with the mating contacts arranged on opposite sides. This creates a symmetrical arrangement which allows the connector to mate even if rotated 180 degrees or inverted.

The shells of D-Sub connectors are usually plastic and can be plain or with special color codes. Special shells made of metal are also available for high-fatigue, high-power applications and EMI shielding. The front of the shells are typically equipped with a wide variety of strain reliefs and latch systems to ensure screw lock, vibration, and cable pull/pulling capabilities.

D-Sub connectors are attached to the Printed Circuit Board (PCB) by soldering. The contacts of female receptacles can also be attached by inserting a wire crimp into the hole. They are then secured to the board with rivets or similar self-contained locks.

D-Sub connectors are characterized by their operating temperatures, voltage ratings, current ratings, and mating operational forces. Operating temperatures range from minus 40 to 85 degrees Celsius while voltage and current ratings are based on the contact surface area and thickness of the contacts. Mating operational forces range from 7.5 to 85 Newtons.

The performance of D-Sub connectors is tested in accordance to international standards such as IEC 61076-2-101. These tests include mating and unmating cycles, contact resistance, insulation resistance, galvanic contact tests, and high voltage tests. All of these tests are carried out in a controlled environment to ensure the performance of the connector.

D-Sub connectors are used extensively in the computer, communication, industrial, instrumentation, and aerospace markets. Their versatility, ease of use, and reliability make them an ideal choice for many applications.

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