Electrolytic caps have an extremely poor lifetime (MTBF). Sanyo on their website state "50K Hrs at 50C". This means only 6250 MTBF hours at 80C for one single cap. MTBF gets worse the more caps are being used of course. I have seen some Panasonic electrolytics state only 2000 hours MTBF at temperature in their datasheets. That's not even one year before a mean failure occurs making these useless in high-reliability applications. Note also that caps in high AC current situations (Buck DC-DC switcher input cap for example) will self heat due to internal resistance, making things even worse. This is probably one of the main failure reasons for PC motherboards. And that's with name brand parts, it's even worse if one ends up buying counter-fit or non-name-brand Electrolytics.
Some of our competitors use Electrolytics all over the place (we don't use any electrolytics) - that's been good for our business. bye, Said In a message dated 11/24/2011 17:08:42 Pacific Standard Time, li...@lazygranch.com writes: I'm not familiar with rubycon caps. The low ESR large value caps are "organic semiconductor." OSCON is a common brand from Sanyo. Finding the ultimate cap is nearly as much fun as finding the ultimate LDO. Check out Nichicon. Or you can stick with the Rubycon. Glancing at their website, they seem to copy the Nichicon product line. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.