I would like to identify this connector in order to buy it.

This is the same size as DB25, but this is not with pin like on the parallel port.

Photo of socket

Socket width

Socket width = 35.12 mm

Distance between screw holes

Distance between screw holes = 47.05 mm

Socket internal width

Socket internal width = 32.31 mm

  • 2
    \$\begingroup\$ Looks like a 50-pin connector which was used for SCSI way back in the day ... \$\endgroup\$
    – brhans
    Commented Jun 4, 2018 at 19:46
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    \$\begingroup\$ Could be something like one of these Hirose DX connectors. \$\endgroup\$
    – brhans
    Commented Jun 4, 2018 at 20:21
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    \$\begingroup\$ Awful picture - I'm sure you could have done far better. \$\endgroup\$
    – Andy aka
    Commented Jun 4, 2018 at 20:23
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    \$\begingroup\$ When taking a picture for connector identification, please put a ruler next to the thing so that there's a way for us to determine its physical size as accurately as possible. There's a few 0.100"/2.54mm whiteboards in the background but they're too distorted to work as a size reference. From the photo it's hard to tell whether it's a Centronics (IEEE-488 or Parallel Printer or SCSI-1) or a Hirose DX, both look similar but the Hirose DX is a bit smaller. \$\endgroup\$
    – MarkU
    Commented Jun 4, 2018 at 20:40
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    \$\begingroup\$ You should measure the dimension over the latches or between the first/last pin centers that corresponds to the data sheet @MarkU posted. \$\endgroup\$ Commented Jun 7, 2018 at 16:44

2 Answers 2


Looks like Hirose DX20-50P(55) or DX40-50P-55. Hard to tell from your photo but I think it looks smaller than Centronics. Suggest you check the measurements in the catalog to confirm.

snip from https://www.mouser.com/datasheet/2/185/DX_catalog-939119.pdf

digkey.com Hirose DX20M-50S(50)

digikey.com Hirose DX40-50P-55



Centronics 50 pin. Popular for SCSI 1

enter image description here

EDIT: Latches don’t match as brhans pointed out. Could be Micro DB50.

enter image description here

  • 1
    \$\begingroup\$ additional info from servo driver datasheet, ibb.co/nDXeJT \$\endgroup\$
    – johnger
    Commented Jun 4, 2018 at 20:06
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    \$\begingroup\$ Looks much smaller & higher-density than SCSI-I, and the latches are different. \$\endgroup\$
    – brhans
    Commented Jun 4, 2018 at 20:12
  • 4
    \$\begingroup\$ This is clearly not the same connector. \$\endgroup\$ Commented Jun 4, 2018 at 20:20

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