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Ceramic capacitors lifetime
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aletropot



Joined: Jun 10, 2012
Posts: 33
Location: Amsterdam

PostPosted: Tue Mar 18, 2014 11:51 am    Post subject: Ceramic capacitors lifetime Reply with quote  Mark this post and the followings unread

Hi all,

What's the lifetime of ceramic capacitors?
And how do I know when a ceramic capacitor passes from good to bad?
I have one 472 with 3.9nF. its this one still ok?

Cheers
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sduck



Joined: Dec 16, 2007
Posts: 442
Location: Nashville
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PostPosted: Sun Mar 30, 2014 8:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've never heard of these going bad. I'm sure they have some kind of life expectancy, but it's probably on the order of 50-100 years or so, possibly depending on how they're used.
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sneakthief



Joined: Jul 24, 2006
Posts: 529
Location: Berlin

PostPosted: Sun Mar 30, 2014 11:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sort of related...here's a case of metal film caps going bad:

http://www.vintagesynth.com/forum/viewtopic.php?f=1&t=65538

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new voodoo



Joined: May 06, 2013
Posts: 90
Location: RVA USA

PostPosted: Tue Apr 01, 2014 9:30 am    Post subject: Reply with quote  Mark this post and the followings unread

generally, my answer would be the same-there are LOTS of things to worry about with parts & components that can and will go bad..from just plain junk/fakes to a million other things--but I would NOT think that age is a factor in ceramic caps generally-most you see are going to be somewhat less than 50 years old and my understanding is that they can easily exceed that in daily usage without fail.
however...
unless im missing something-nothing in your post indicates that your capacitor is any age at all-it could be brand new.

I believe that you are thinking that 472 or 3.whatever nf indicate the cap's age?
just FYI -that's not the case, generally a 3 digit number followed (or not) by letter comprises a semi-standardized code that indicates the capacitance etc
the other thing you mentioned is the capacitance (and can be converted to uF/mF, pf, etc)

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