I am buying a rotary switch, and I have found these terms:

2 x Off/(On)


2 x Off/On

Could you please explain me the difference?

example of a switch with Off/(On) specification enter image description here
(originally from this page)


Usually positions in parenthesis are momentary positions.

So a switch that is Off/(On) is a single throw switch that is momentary switch. It will not stay in the on position, but will spring back to the off position. A switch that is Off/On will stay in either position.


Sounds like the first one's a SPDT spring-loaded single-side-stable OFF-momentary ON switch, while the second one is just a vanilla DPST ON-OFF switch.


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