need to buy decoupling capacitor.

A

alexsoad

New Member

• Jan 12, 2011

• #1

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,

 

1

#12

New Member

• Jan 12, 2011

• #2

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

New Member

• Jan 12, 2011

• #3

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

Pete.

 

A

alexsoad

New Member

• Jan 12, 2011

• #4

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

 

Last edited: Jan 12, 2011

C

cowana

New Member

• Jan 12, 2011

• #5

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.