D-subminiature connector, also known as D-sub, is a connector named after its metal shell shaped like the letter D. This ubiquitous connector is widely used in many fields ranging from consumer products to satellite equipment.


The D-sub connector contains two or more rows of parallel terminals surrounded by a characteristic D-shaped metal shell. This metal shell not only provides support for the mechanical structure but also has the function of shielding electromagnetic interference. There are many ways to connect the system circuit and the terminal on the D-sub connector, including crimping, soldering cup, PCB soldering, PCB press-in type, and winding connection. Many times the connector is also equipped with a locking system to ensure that it can remain connected even under shock and vibration. Sometimes people tend to confuse D-sub connectors with micro-D connectors and SCSI accessory device connectors (representing products HD-50 and HD-68). In fact, these products and D-sub connectors are separate systems and have obvious differences. D-sub is sometimes called a "rectangular cabinet" connector. The related models that can be heard in the jargon are DB9, DB15, DB25, DB37, and DB50, and the number refers to the number of terminal cores of the connector.


The purpose of D-SUB

D-sub connectors can be used in a variety of electronic products. This type of connector is commonly found in communication port devices and plays a role in establishing connections between different products such as computers, printers, and power supply units. Among them, the DB9 connector is used in token ring networks and controller area networks (CAN). D-sub connectors are also widely used in computer video output, game controller ports, multi-frequency analog signals, and AES digital audio recording studios. Over time, the use of connectors has also changed with the advancement of technology. For example, early Apple computers used connectors to connect external floppy disks, and Carmendore’s Commodore Amiga computer used the connector to connect to the external floppy disk and also used it to connect to the video output. However, due to the size and cost of these connectors, D-sub connectors have already withdrawn from the consumer product stage. However, this type of connector is still active in the field of non-consumer products and continues to bring significant comprehensive utilization value to their end-users in terms of shape, size, density, and cost.

Related Products

Elecbee produces a wide range of D-sub connectors and their accessories. The standard and high-density D-subminiature connector series are of high quality and reliable, and there are as many as six types of packaging and multiple performance options to choose from, in order to achieve your most ideal cost-effective match. The terminals used in all Baoxi D-sub connectors are solid terminals precision machined to ensure their reliability, durability, and high strength. The mixed-D connector is a sub-series of the D-sub connector. This series is characterized by mixed density and can be combined with No. 8, No. 20, or No. 22 terminals in a single connector to meet the needs of users for combined applications of signal, power, optical fiber, coaxial, and high voltage terminals. What's more worth mentioning is that we also provide a variety of sizes of housings and terminals, plus various accessories and configuration options for your convenience (blind mating system and sequential mating system are also included). If you need products related to the aviation industry, please pay attention to our high-performance D-sub connector part specially designed for aviation flight. Many of these connectors comply with NASA GSFC S-311 specifications, have low magnetic properties, and are equipped with lightweight aluminum tail shields that provide additional protection.

In summary, this article has explained the D-SUB connector for everyone. I believe that everyone will have a deeper and deeper understanding of the D-SUB connector. I hope this article can be of greater reference value for readers. If you want to learn more about connectors, you can browse other articles on our blog, or continue to follow our updates.