# Plug and jack with common pin number

Canonical URL: https://eloragrid.ai/symbols/iec-plug-jack-common-pin-number
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: X
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Plug/Jack with common pin number
Autodesk IEC-60617 Symbol Preview: Connectors - No Wirenumber Changes; vendor family reference, not certified IEC geometry.
Related representation: [Plug and socket connector pair](https://eloragrid.ai/symbols/plug-and-socket-connector-pair)

A plug and jack pair carrying one shared pin number for both halves rather than separate numbers on each half.

## In plain English

### What does Plug and jack with common pin number mean?

Some connector symbols carry a single pin number shared by both mating halves, because the pin and socket on a given contact position carry the same number in the connector insert. This keeps schematics uncluttered and matches how most connector manufacturers number inserts.

### A simple example

The common number assumes both halves use matching numbering. Where a harness connector is mated to a board header with different numbering, separate pin numbers are needed. This is a publisher drafting variant, so the underlying connection meaning is the same as an ordinary plug and socket pair.

### What the drawings help you do

Confirm both halves use the same pin numbering scheme. Read the pin number once for both halves. The common pin number form carries one number for both halves; the standard pair can carry different numbers per half.

### This particular reference

A plug and jack pair carrying one shared pin number for both halves rather than separate numbers on each half. The common pin number form carries one number for both halves; the standard pair can carry different numbers per half.

### Terms

- Normally open / normally closed: The contact state in the normal condition defined for the drawing.
- Terminal: An identified point where a conductor connects.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [AutoCAD Electrical: Connectors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7175D293-9F4C-485C-8E2D-DE684820D53B.htm)
- [Autodesk IEEE Symbol Preview — Connectors - No Wirenumber Changes](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-0B14FEAB-110A-4DD3-884E-0A2F8F9E76F7.htm)


## What it represents

Some connector symbols carry a single pin number shared by both mating halves, because the pin and socket on a given contact position carry the same number in the connector insert. This keeps schematics uncluttered and matches how most connector manufacturers number inserts.
The common number assumes both halves use matching numbering. Where a harness connector is mated to a board header with different numbering, separate pin numbers are needed. This is a publisher drafting variant, so the underlying connection meaning is the same as an ordinary plug and socket pair.

## How to read it

- Confirm both halves use the same pin numbering scheme.
- Read the pin number once for both halves.

## Information to show or reference

- Use common numbering only where the inserts match.
- Keep the connector tag on the symbol.
- Switch to separate numbers for mismatched pairs.

## Important distinction

The common pin number form carries one number for both halves; the standard pair can carry different numbers per half.

## Facts

- Graphic cue: Plug and jack pair with one pin number between them
- Publisher form: Plug/Jack (common pin number), Autodesk IEC-60617 preview
- Preview: Original educational illustration; consult the publisher and applicable standard for the exact graphic

## Public references

- [AutoCAD Electrical: Connectors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7175D293-9F4C-485C-8E2D-DE684820D53B.htm) — Autodesk. Public IEC-oriented preview listing the common pin number plug and jack form.
- [Autodesk IEEE Symbol Preview — Connectors - No Wirenumber Changes](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-0B14FEAB-110A-4DD3-884E-0A2F8F9E76F7.htm) — Autodesk. Public IEEE-oriented preview of the same connector family.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.