Electronics > Projects, Designs, and Technical Stuff
Aluminum Electrolytic Capacitor Short circuit failure and Infant mortality
Ashraf Almubarak:
Yes I noticed that too.
However, those have two years difference age (presumably). Would the manufacturer make difference in the packaging printing?
I believe I was looking for your answer in the probability to purchase a counterfeited one. thanks :-+
Conrad Hoffman:
Aluminum electrolytic caps almost never fail shorted. I suspect counterfeit caps, but also check the solvent resistance and how the boards are cleaned. Easy to shorten the life of a cap with bad cleaning. Also watch out for water-washable flux that isn't being fully washed out.
Bud:
If you have access to samples of both capacitors, cut them open and examine the guts for obvious differences.
RoGeorge:
You should send a few failed caps to Nichicon, together with a few good ones from the same lot, so Nichicon can tell if those are fake, or just out of specs caps that were sold on grey market instead of being destroyed.
Most probably those are fake Nichicon. Shenzen is full of very cheap components for a reason.
Jwillis:
I don't want to start a heated debate but here,s what I found out.
As far as I know there are no Nichicon facilities in Shenzen . But There is one in Wuxi that is approved by Nichicon for some electrolytic and foil capacitors for power supplies. Which specific ones I couldn't find information on. Nichicon does have a trading office in Shenzen. There are some other facilities in Malaysia but didn't research those. As far as I can tell ,most of Nichicon capacitors are manufactured in Japan.
There are probably hundreds of possible theories that iI won't get into. But to be fair ,I can't see Nichicon exporting product to be sold cheaper, unless it's old stock or factory seconds. That's just my own opinion of course. Also the print just doesn't seem right .But again it could be old stock to be fair.
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