One more note: the fiberglass composite material which makes up modern circuit boards is often called FR-4. This stands for Flame Retardant 4. I believe that the raw fiberglass material is called G-10 but once they add the flame retardant chemicals to it, it is called FR-4. Sean On Mon, Aug 30, 2010 at 1:37 AM, Sean Breheny wrote: > It stands for UL flammability standard 94. V-0 is the best rating > (self extinguishing within 10 seconds after removal of external heat > source). > > See: http://www.rtpcompany.com/info/ul/ul94v012.htm > > Sean > > > On Mon, Aug 30, 2010 at 1:14 AM, Justin Richards > wrote: >> While on the topic of Circuit Boards, I have seen many boards with 94V >> on the component site. >> >> Currently I have in front of me a graphical LCD display with A1 94V-0 >> in the top left corner. >> >> I have seen this on many boards inside DVD players, CD players, Video >> player TV's etc. >> >> Long ago I drew the conclusion that it is not related to supply volts. >> >> Any clues as to what the 94V is for. >> >> Justin >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .