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Aluminum Electrolytic Capacitor Short circuit failure and Infant mortality

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Ashraf Almubarak:

--- Quote from: 3roomlab on December 12, 2019, 07:01:52 am ---id say the 2 are different
maybe the unit on the R is fake?

--- End quote ---
so whats the correct answer?
Yes you are right the suspecious one is on the right.
I contacted my supplier and they claim it is original but they could give a proof to trace back to Nichicon.
Now they will buy 1000 pcs from mouser. 

Ashraf Almubarak:

--- Quote from: 3roomlab on December 12, 2019, 07:01:52 am ---you say you gave a bom to a assembler? but how do they prove to you things are original?
if you search for a video by bunnie huang on fake chips etc, even he as a professional builder, get cheated by authorized dealers. according to his statistical study on certain products, distributors in china could mix in 3% of fake chips intentionally with originals to sell in bulk. and this is authorized distributors, not those down at assembler levels.

--- End quote ---


This is very shocking info. Authorized dealers mix 3% with the original one??
It will be a different topic, however, if you are experienced in manufacturing electronics in bulk. How to supply 100K pcs of each component?? I don't believe Mouser & Digikey would have this amount. I should contact the manufacturer directly and bypass the dealers?? Or I will find the stock in the dealers warehouse??

Ashraf Almubarak:

--- Quote from: Jwillis on December 10, 2019, 02:19:18 am ---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.

--- End quote ---

If you are experienced with electronics industry. what is your suggestions to supply large quantities of such components?? 20K, 50K and 100K.

Ashraf Almubarak:
Very good information.
Our company is just in its beginning so we learn the hard way.

I will consider this in the future.

Kerlin:
I have had substitution problems in China.
The factory was owned by the company I worked for.
I found and proved the problem was a supervisor.
When  I asked him about it he reminded me where I was and challenged me to do anything about it.
My wife had the same problem. The imported Japanese clay had been substituted with local rubbish which had dirt in it.
Why go there? It's cheap ? Not when it costs you your business.

So what do you intend to do - They bet, and I bet, you and others will go back.!

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