need to buy decoupling capacitor.

[alexsoad]

i need to buy some decoupling capacitors (100nF), and i have a problem.

for example: ceramic capacitor: 100nF 500V

is there any difference between this capacitor and one with 100V ?

which one is better? or the voltage parameter isn't important to the capacitor.

thank you very much,

 

[#12]

Probably a translation problem but, cpapcitors don't come with voltage. They survive voltage. One of those capacitors you mentioned will survive 100 volts. The other one will survive 500 volts.

 

[SABorn]

As long as the cap rated voltage is greater than the operating voltage, either will work fine.

Pete.

 

[alexsoad]

thank you very much both of you.
you really helped me in time.

 

[cowana]

High voltage rating means:
- Can cope with higher voltage
- Physically larger
- Less leakage at a given voltage

I think higher voltage capacitors have higher ESR, but I'm not 100% sure on that - it could just have been a particular batch.