And then there's parts that are incorrectly marked.
I've seen this with both electrolytics and diodes. Not counting counterfeit
parts that are overstressed or just incorrect.

RP





this is true of most parts, particularly about not necessarily blowing
immediately when "abused".  components often fail some time after some
initial abuse or repeated abuse.  this is very common in the case of
voltage surges and lightning etc.  i've repaired a lightning damaged
answering machine, had more parts fail within hours, replaced those and
had others fail the next day before i gave up and realized it had taken
a big enough hit to marginalize most or all of the parts.  i've seen
this with computers as well when only part of it (say a modem port)
seems to have failed at first and then more problems crop up weeks or
months later.
>snip ......



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