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Contact image of various D-Sub connectors

D-Sub , as an abbreviation for English D-Subminiature , is a widespread design of a connector system , which has applications in the field of computer systems and data processing, among other things. This connector system is defined internationally in IEC 807-2. Depending on the application and country, this connector system is specified in various more extensive standards due to its widespread use, for example in the US military standard MIL-C-24308 or in Germany in the DIN standard 41652-1. Individual variants such as ISO 4903 for DA-15 and ISO 2110 for DB-25 are defined within the framework of ISO standards .


The US company Cannon (now part of ITT Corporation ) developed in 1952 a trapezoid- shaped connector type, and called his name because of the D-like shape of the external connector and because of the very small for that time design "D subminiature". This connector type was incorporated into the world of standards relatively quickly, especially in the MIL standard 24308.

Through the many years of use, the most diverse abbreviations of this "D shaped subminiature" connector have established themselves on the market, e. B. D Sub, D-Sub, DSUB, Sub-D, SUB-MIN-D, DE9 (D-Sub 9-pin), DB25 (D-Sub 25-pin), HD15 (D-Sub 15-pin high Density), HP50 (D-Sub 50-pin half pitch) and so on. In laboratory jargon it is still referred to today as a “Cannon connector ”, but in the audio and stage area it is understood to be the XLR connector, also developed by Cannon .

to form

Typical versions of the D-Sub type are:

There are also a large number of special variants, such as a combination of high-current contacts with signal contacts or designs in which coaxial connectors , such as the "13W3" design, are integrated into the D-Sub connector housing. Because of their compact design, these designs are used, among other things, in the field of avionics and military technology. In the case of personal computers , the ATX standard in version 2.2 from Intel specified the color scheme according to the type of interface.


size Normal density High density Double density Distance between the holes
for screw connection
Surname Pin arrangement Surname Pin arrangement Surname Pin arrangement
E. DE-9 5 + 4 DE-15 5 + 5 + 5 DE-19 6 + 7 + 6 25.0 mm
A. DA-15 8 + 7 DA-26 9 + 9 + 8 DA-31 10 + 11 + 10 33.3 mm
B. DB-19 10 + 9 38.9 mm
B. DB-23 12 + 11 44.3 mm
B. DB-25 13 + 12 DB-44 15 + 15 + 14 DB-52 17 + 18 + 17 47.0 mm
B. DB-35 18 + 17 38.9 mm
C. DC-37 19 + 18 DC-62 21 + 21 + 20 DC-79 26 + 27 + 26 63.5 mm
D. DD-50 17 + 16 + 17 DD-78 20 + 19 + 20 + 19 DD-100 26 + 25 + 24 + 25 61.1 mm
F. DF-104 21 + 21 + 21 + 21 + 20 63.5 mm

Geometry of the pins

The pins for signal application have a diameter of 1 mm. The rows of pins are 2.84 mm apart, adjacent pins are 2.74 mm ± 0.1 mm for sizes A and E, and 2.77 mm ± 0.1 mm for the other sizes. The rows of pins are offset by half this distance. In the case of special designs such as D-Sub connectors with high-current contacts or with integrated coaxial connectors, other diameters and distances occur.

In the case of the "high-density" types, the distance between the rows of pins has been reduced to 2.41 mm and the pins next to one another to 1.98 mm. With “Double Density” the distances have been further reduced; The rows are only 1.90 mm apart, the pins 1.65 mm

Mechanical locking

The mechanical locking - it is not implemented on all plugs - is implemented via two screw connections on the side. The usual threads are either the metric M3 or an incompatible UNC 4-40 . For correct locking, the plug and socket must have the same thread type.

Numbering of the connections

With regard to the numbering of the individual contacts ( pins ), there are always mistakes, which is due to the fact that some use the soldering perspective as a basis, while others use the top view (plug side) of the finished connector.

aView on the mating side ( top view ), see types.


Inverter adapter for D-Sub connector

To differentiate between polarity (or “gender”), the common terms male / male (plug pins) and female / female (sockets for holding the pins) are also used for D-Sub plugs and sockets . Most manufacturers either use the short form derived from the English, i.e. M and F or P and S for plug and socket . A type with the designation “D-SUB 9P” is for example a plug with nine contacts, a type with the designation “D-SUB 25S” is a socket with 25 contacts.

plug Rifle
male Female
times female
M. F.
Plug Socket
P S.

In the context of the sex of the respective D-sub type, there are so-called "gender changer" (Eng. "Gender converter", see gender changer ) which invert the gender, ie male adapt to female or vice versa. The same numbers are connected to one another, which is why the pins or sockets cannot simply be connected straight through, but instead a page change takes place in the internal structure.


D-Sub plugs and sockets are produced in different versions and are quick, cheap and universal to use. The following are common:

Web links

Commons : D-Sub Connections  - collection of pictures, videos and audio files

Individual evidence

  1. IEC 807-2: Rectangular connectors for frequencies below 3 MHz. Part 2. Retrieved February 5, 2016 .
  2. MIL-C-24308c, Military Specification. Retrieved February 5, 2016 .
  3. a b DIN 41652-1: Plug connector for slide-in technology, trapezoidal, round contacts ∅ 1 mm; Common installation features and dimensions; Design overview (June 1990)
  4. CC Thomas: Amplimite Plug Assy, Size 1 thru 5, Series 109 with zinc plated shells. In: Farnell. TE Connectivity, May 17, 2005, p. 1 , accessed February 6, 2020 (English, data sheet).
  5. DF-104P D-subminiature connector pinout drawings . interfacebus.com. Retrieved July 24, 2014.
  6. Manufacturer's data sheet: D-Sub - Accessories for subminiature D connectors. (No longer available online.) Archived from the original on February 5, 2017 ; accessed on February 5, 2016 .