Kevin,

We were forced in certain circumstances to use this finish because it was the 
only one available on ferrites for a period of time.  There is no big problem but 
there is an issue.  Palladium silver finish can wet poorly when it ages.  Fresh 
parts will likely perform acceptably well.  Older parts may not.  If you can do 
so perform solderability testing per IPC/EIA J-STD-002B on each lot you 
receive.  Make sure your supplier knows that part of your accept/reject 
criteria will be based on the results of this test.  If the terminations are in 
good condition the parts solder equal to the more common finish.

If the more common finish of nickel barrier with tin coating is available, I would 
recommend using that instead of palladium silver.  Based on my experience.  
nickel barrier with tin or tin lead has a much longer shelf life and we have 
experienced far fewer solderablity issues with this termination.

Drew Meyer  

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