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Watson A.Name - Watt Sun, Dark Remover

Jan 1, 1970
0
Watson A.Name - Watt Sun said:
[snip]
2. Capacitors that have AC line voltage across them need to be rated for
such duty. Put 110 volts AC across any old .47 uF 200V capacitor and
there is too much of a chance it will fail, with heating being part of the
problem.

I've looked for a reference on what all the X, X2, and X2S
designations mean, but I haven't found an explanation yet. I'd like
to know which cap to use for those AC line voltage circuits.

X2 means the cap should not be used where failure can expose people to line
voltages. Y2 means they can be used in this capacity. There is a picture at
the bottom of this link:

http://www.illcap.com/pdf2/Series/MKT.pdf

There was a great tutorial I found a few months ago when I was looking at
capacitors for some reason, but I can't seem to find it now. If I relocate
it, I'll post it.

Regards,
Bob Monsen

Thanks for the info. I read somewhere that metallized film caps have
the ability to burn open when the dielectric fails. That makes it
safer for a project like this where the other parts might burn up if
the full AC line voltage gets on them.


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