D -sub, as a abbreviation of D -Subminiature, is a widely used design of a connector system for data connections.


The American company ITT Cannon developed already in 1952 a connector type, and called his name because of the D -like shape of the outer connector and because of the very small for its time design "D subminiature ". This configuration was relatively rapidly absorbed into the world of standards, especially in the MIL standard 24308th

Through years of usage the variety of abbreviations this " D subminiature shaped " connector have established themselves on the market, such as D-Sub, D -Sub, DSUB, D-Sub, 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.


Typical versions of the D -Sub type are:

  • Two-row 9-pin, without screws, for digital joysticks, paddles or light pen
  • Two-row 9-pin or 25-pin as a serial interface RS- 232 (more precisely: EIA -232 ) or V.24
  • Two-row 15-pin game port as intended primarily for analogue joysticks, paddles, etc. formerly
  • Two-row 15-pin monitor connector for Apple
  • Two-row 15 -pin with lock (network AUI)
  • Two-row 19 -pin for Atari DMA port (" ACSI " ), Apple Floppy connector "Smart Port"
  • Two-row 25-pin parallel interface as IEEE 1284 Printer
  • Two-row 25-pin SCSI -I and for digital TDIF 8- channel audio interface
  • Two-row 23-pin for Amiga computers for external floppy drives and monitor cables
  • Triple-row 15 -pin for monitor cable ( " HD15 "), see VGA ( connection)
  • Closely spaced 50 -pin SCSI ( " HP50 " )
  • With a smaller pin spacing as higher densities (high density, HD)
  • Half-pitch ( Pitch 1.27 mm, half- pitch) or
  • Combined with coaxial connectors, such as " 13W3 " (see VGA connector)


Geometry of the pins

The pins have a diameter of 1 mm. Overlapping pins are at a distance of 2.84 mm, adjacent pins are at a distance 2.77 mm ± 0.1 mm. The rows of pins are arranged offset by half that distance.

Numbering of terminals

Regarding the numbering of the individual contacts (English: pins) it always comes back to confusion, what does it matter that some underlying set the Lötperspektive, others, however, the top view of the finished connector.

DE -91 9- pin connector (female)

DE -151 15 - pin male (male)


D -Sub connectors and sockets are manufactured in different versions and are quick to use cheap and universal. Common are:

  • Lötkelchanschlüsse where any wires can be soldered ( universally applicable, also Pin assignment changeable)
  • Print assembly for circuit boards, such as motherboards and expansion cards. Depending on the model and manufacturer vary the dimensions of the circuit board, the plug they are identical and fit.
  • Insulation-piercing contacts for direct rapid connection of ribbon cables. These are relatively expensive, as are required for D- sub connection different blade contacts due to the different grid size of ribbon cable.
  • Crimp connection for vibration-resistant connections

DB -25 (female) in PCB, increased pink for LPT / parallel port / printer port IEEE 1284

D -SUB EN-9 (male) in PCB, blue green for serial interface RS-232/V.24

D -SUB EN-9 (male) white, universal, with numbering and Lötkelchanschluss ( view on solder side)

D -SUB EN-9 (male) white, universal, with numbering and Lötkelchanschluss (view of connection side)

International standards

In Germany, these connectors are described in the DIN standard DIN 41652, which relates itself to MIL-C- 24308 and IEC807 -2 ( 1985 edition ).

Other international standards are:

  • DA -15: ISO 4903
  • DB -25: ISO 2110
  • DC -37: ISO 4902


DIN 41652-1: Connectors for plug technology, trapezoidal, round contacts ∅ 1 mm; Common mounting features and dimensions; Design Overview ( June 1990)

  • Connectors