I think '-O' is the retail version, i.e. In a regular retail box. Hopefully somebody else here can confirm I am correct.Example for the X10SDV-8C-TLN4F: "X10SDV-8C-TLN4F-SINGLE" (more expansive) and "X10SDV-8C-TLN4F-O". What's the difference ?
Thks
The single ones at a guess would be single boards repackaged from a multi pack.
Of course could also just be the way it's been added to the web shop.