DEC backplane power connectors

Noel Chiappa jnc at
Thu Jan 28 13:39:04 CST 2021

    > I have a feeling there are two shell designs for the 6 pin.

Like I said, I have a vague memory of another keying design (I think it used a
ridge running parallel to the direction of insertion), but I don't think it's
from any DEC gear. There is definitely yet _another_ keying design, with
triangular sawteeth, but again, I don't think any DEC gear used that.

    > The one on my DD11-DF that I want to mate has detents in the corners
    > while the catalog picture for the 6 pin on your part number shows a
    > square in the center of the side.

Yes, the ones on the DD11-[C,D] (female shell, male pins) have 2 filled-in
corners, and the ones on the harness into which they plug (male shell, female
pins) have both the cutout corners (to match the filled-in corners on the
female shells), _and_ "a square in the center of the side".

As I said, I had verified that my female shells plugged into the male shells
on an -11/40 harness; I just went and checked, those males have the exact
identical shape to the ones I got (with the listed part number), including
both cutout corners and the square in the center of the side. (Oddly enough,
the 15-pin male shells used in that generation of DEC power connectors do not
have the square in the center of the side, just the cutout corners.)


More information about the cctech mailing list