Searching for low tolerances unpolarized capacitor

[Junus2012]

Hello,

I want to search for an unpolarized 1 µF capacitor with through-hole technology for my wiroboard design. I need to have it will low tolerances of 5% or less.

It will be helpful if you provide me with a tool that shows me this result and so I can use it as well to determine the other component of my circuit

Thank you
Regards

 

[KlausST]

Here's a document that discusses capacitance change vs. voltage.

This is for ceramics, I know they are voltage ciritical, thus I recommended foil capacitors.

****

But even with ceramics .... you don´t need to worry if the capacitor is rated for higher voltage.
Higher voltage rating improves the voltage problem.

The diagram shows that the capacitance varies down to about 30% of the initial value.
But if you use a capacitor with 5 times higher rated voltage it will go down to 80% only.
(raw estimation)

Klaus

 

[d123]

Not sure of price of these, but these are precision film capacitors, used for standards, etc. What a marvellous kit, if only...

pfc precision film capacitors

 

[D.A.(Tony)Stewart]

Choosing a 5% capacitor may be overkill from the user's perspective and unlikely to know the difference for AC coupling.

There are practical considerations as well as cost, availability, and frequency/temperature, and DC voltage dependence that interferes with the 5% tolerance.