D-SUB Connector

D-SUB connector refers to input and output connectors containing two or more rows of contacts enclosed in a shield. Their name comes from the D-shaped metal shield that keeps them secure against electromagnetic interference and provides mechanical support.

Also known as D-SUB plugs, their connectors can be available with mixed contacts. Primarily used in sensitive electronics such as EMI or RFI, test and measurement equipment, and notebook computers.

D-SUB Connector

Features of a D-SUB Connector

D-SUB plug has a pair of pins encircled mainly by a metal casing. Also, the sockets fit into the wrap that contains the pins. Both wraps are connected to a cable shield, thus allowing continuous electric protection that surrounds the entire cable and the connector system.

The DB plug has jackscrews that allow screws on the cable end connector cover, which lock the connectors together, thus reducing mechanical strain. These DB connectors consist of particular prefixes and an actual number of pins. Additionally, the DB connectors have special pins primarily used for high-performance video connections.

Factors to consider when choosing a D-SUB Connector Type

  • The number of Pins or jacks in the connector 

Initial letters and their corresponding numbers indicate the contacts in each socket of each connector’s plug. However, some have HD initials added, meaning they are high-density and feature a closer arrangement of pins and jacks within the shells.

  • The connection Methods

The D-SUB connector types differ in their connection and how they connect the contacts and the electric system. Also, they are well suited for locking technology and thus suitable for connection purposes. The connection duration of the D-SUB plugs provides a range of connecting styles for other uses such as crimping and soldering purposes.

Features of a D-SUB Connector

D-SUB Connector  

D-SUB Plug consists of crimping, IDC connectors that allow soldiering connectors, and various types of board insertion compatible with each other in the fitting, thus allowing multiple connections when combined.

DB plug has an Anti-reverse insertion structure that is a solid steel shell in nature and contains trapezoidal polar connections that prevent reverse connections. Furthermore, DB connectors have five types of shell sizes that are compact rectangular connectors.

D-SUB plug has various accessories for better performance, such as a cable clamp and a stationary for mating and fitting. The D-SUB connector type contains higher current carrying capabilities than the standard connectors.

The D-SUB connector has different density variants, including high, standard, and double densities that cater to most requirements such as coaxial connections. Also, in situations where high current pins are needed, specialized D-SUB connectors of the required density should be in use.

Types of D-SUB Connector

Two major types of DB connectors are Micro-D and Nano-D sub connectors. Micro-D connectors have the length of a standard D-SUB plug, while Nano-D has a span half the size of Micro-D. They are primarily applied in the military and aerospace industries and are available to the relevant MIL standards.

Rugged D-SUB connectors are also a type of DB connector, and they have a strong shield, which makes them suitable for harsh environments, and extreme conditions and are resistant to water. They are available in a standard density of 9 pins and a high density of 15 to 26 pins.

D-SUB Power & Hybrid consists of high-power connectors commonly used in industrial and internet network fields. They are offered a current rating of 7.5A for signal strength and have up to 18 contact arrangements for signal and power.

Challenges of using the D-SUB connector

D-SUB Connector

Originally, DB plugs were the most compact and practical connectors in electrical and communication markets. Many personal computers consisted of the D-SUB ports for eternal connection purposes, including printers and internet components.

However, though they are still in use in consumer electronics, they longer dominate the markets. Furthermore, their large size and unpredictable data transfer speeds made them easily susceptible to replacements by USB ports for connections of personal computers and external devices.

Also, the DB connector implementation process requires a vast amount of power source as it has lines of communication and data but no power lines.

Applications of the D-SUB Connector.

D-SUB plugs are still available for use and applicable in many types of equipment. Due to their low costs and reliability, media applications in video graphics array connections in television, gaming, and recording devices.

D-SUB connector types are still more rugged and compact, making them a good choice for portable recording where jostling is a risk. They are also widely used in internet networks and communication ports to connect the computer and other hardware devices like printers or power supply units.


Though USB ports are replacing them, D-SUB connector types are still available for use and applications. Designed in different varieties, they are suitable for application in video arrays, printers, and the gaming world. Also, internet network users and industry experts prefer them because they easily connect to ports.

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