I am looking for the smallest/lowest profile connector(plug and socket), based on the following criteria:
- In the ballpark of 2.1mm/3.5mm sized connectors
- Must be circular/round
- Able to be panel mounted
- Have >=3 poles
- Able to be plugged and unplugged while power is on without shorting, and hence, able to support not only signal, but power transmission(max 12v)
Here is what I have found. The size of the 3.5mm connector is almost perfect, but it doesn't fulfill the 5th criteria. While for mini din/xlr connectors, the "handle" of the plug connector makes it too long/large. For RJ11/45 jacks, they are not circular, which makes cutouts and mounting difficult on metal panels, and also plastic ones when you need to add many. Although special made rounded RJ45 sockets could be found for panel mounts, they are costly in huge amounts and increases the connector size multiple times.
If anyone knows of a connector which fits all the criteria above, input is appreciated.