Hello,

The numbering scheme looks like EPCOS, I assume you picked the right 
datasheet, but maybe Prashant can answer this better.

IMHO The remark on page 32 applies to normal operation.

I assume (as EPCOS writes on page 31 "Complete removal of flux is 
recommended to avoid surface contamination that can result in an
instable and/or high leakage current.") appropiate cleaning processes 
are allowed, and maybe aqueous cleaning would also work but with some 
precautions (dry bake after cleaning and before tests) In that case I 
would ask EPCOS and/or look for cleaning recommendations on their 
website.

Best regards
Matthias


On 27 Jan 2010 at 22:40, Ahne Oosterhof wrote:

> Check: http://www.epcos.com/inf/75/db/CTVS_09/Standard__CU.pdf
> Read warning on page 32.
> 
> Enjoy, 
> Ahne.
> 
> PS: All attachments are always stripped from the message in the
> TechNet. I hope I picked the correct manufacturer.
> 
> 
> 
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of prashant chopra
> Sent: Wednesday, January 27, 2010 20:34 To: [log in to unmask] Subject:
> [TN] MOV issue
> 
> Hi,
>  
> I need help on issue regarding the MOV. We are using this MOV on one
> of our PWA. This PWA goes through the cleaning process (aquawash). 
> Then the PWA is subjected to various tests.The MOV failure happens
> during a high voltage test due to hydration of device during cleaning
> process.   I am attaching the datasheet above. the Part number being
> used is CU3225K275G2K1.   Has anyone observed this before? Can anyone
> let me know what can be done to prevent this failure. (At the moment,
> we cannot stop the cleaning process during the PWA build).   Looking
> forward to comments and help.   Rgds Prashant
> 
> 
>       Your Mail works best with the New Yahoo Optimized IE8. Get it
>       NOW!
> http://downloads.yahoo.com/in/internetexplorer/
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-- 
Matthias Mansfeld Elektronik * Leiterplattenlayout
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