I'm looking at a schematic where various wires connect to blocks.
Sometimes the blocks have a wishbone symbol with a number next to it.
Other times, it's a wishbone symbol without a number.

I've been unable to find the correct name for this symbol to learn more about it.
What does it mean?

enter image description here

Possibly unrelated, but why do the above blocks have dotted lines, while the one below does not?

enter image description here

  • 1
    \$\begingroup\$ pin & socket , guess which is which \$\endgroup\$ Commented Nov 15, 2016 at 19:45
  • \$\begingroup\$ A lot of the time, dotted lines making a box on a wiring diagram can mean the segregated area is in a different are or place. This could mean inside a cabinet in the same area as the rest of the drawing, or in a completely different location to the rest of the drawing. \$\endgroup\$
    – Joshyp00
    Commented Nov 15, 2016 at 19:50
  • \$\begingroup\$ For the second question, it looks to me like the connector mate to P331400 is not defined at this drawing level. I would guess it mates into a pcb or some ots part. Whereas the J/P50025 are both defined at that drawing level. \$\endgroup\$
    – klamb
    Commented Nov 22, 2016 at 17:38

1 Answer 1


pin & socket interfaces are shown with

  • "> and >" or
  • "< and < " with interface showing type by intuition or
  • in this case socket and pin number
  • where J is for Jack , now unisexually called Receptacle meaning fixed connector because for other reasons and this Jack is "Female" or S=Socket
  • where P is for Plug, meaning moving connector.

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