Home › Forums › General Electronics › What is OA in OA79 Diode ? › Re: What is OA in OA79 Diode ?
April 25, 2013 at 7:14 am
#7392
![](https://electrosome.com/wp-content/themes/porto/images/lazy.png)
Keymaster
The designation of OA is inherited from old European designation system for Vacuum Tubes.
O – Cold Cathode
A – Low Current Diode
For More Details please visit this page ..
http://en.wikipedia.org/wiki/Mullard%E2%80%93Philips_tube_designation