Small Capacitors: What Numbers Critical?
In article ,
"(PeteCresswell)" wrote:
I've got a couple of IP cams where the same cap failed.
It's a 15 uF, 100v radial cap spec'd to 105c.
But I'm having fits trying to find a replacement where they don't rape
me on shipping.
Can I shop for something with slightly different specs?
i.e. is 100v just an upper limit beyond which the cap will fail... and I
could replace it with a 200v or 300v cap?
What about uF? Do I use a 20 or 30 uF at my own risk?
Pete-
I saw this same question recently. I did not reply because I thought
others had good answers. Basically, the answer "depends"!
A higher voltage is acceptable unless the physical size is a problem.
Higher capacitance might be OK if it is used as a power supply filter.
If it is used as part of a timing circuit, then stay close to the
original value.
Failures of the same part on multiple devices could be the result of the
original manufacturer buying a bad batch and/or counterfeit parts. If
your replacements do not solve the problem, it could be due to a poor
design that over-stresses the part.
Fred
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