Switch configuration code/naming convention?

[Watth]

Hey EEVfolks,
Would you have a reference/guide for switches (toggle/lever, etc.) configuration naming?
For example, if I want to find a toggle switch with a neutral default position, and a temporary position for up and down what should I look for? Something like (On)-Off-(On)?
Thanks!

[TimFox]

Yes:  the (parentheses) indicates "momentary" and the middle location of the code without parentheses indicates the center position.
For example, here is a page from Mouser's search engine, narrowed down to 78 examples:
https://www.mouser.com/c/electromechanical/switches/toggle-switches/?bushing%20size=15%2F32-32&illuminated=Non-Illuminated&m=C%26K%20Switches&mounting%20style=Panel%20Mount&product%20type=Toggle%20Switches&instock=y

[Benta]

That's one system.
I've seen mom-off-mom as well. Depends on the manufacturer.

[eblc1388]

What is the functional/usage difference between switch type on-off-on vs on-none-on, i.e. PT101 and PT103 in the following image?

[themadhippy]

What is the functional/usage difference between switch type on-off-on vs on-none-on, i.e. PT101 and PT103 in the following image?

could it be  that position 2 dont exist,the switch can only be in position 1 or 3.

I've seen mom-off-mom as well.

Or in some places biased

[eblc1388]

I see. "None" means the position does not exist and its really a two-position switch.

[EPAIII]

It's a table so they just had to put something in the middle box or someone would ask what does a blank box mean.

What is the functional/usage difference between switch type on-off-on vs on-none-on, i.e. PT101 and PT103 in the following image?