How to interchange the capacitors

Thanyou very much for your comment.

Actualy this capacitor is a smmothing capacitor in a SMPS. I would like to know that if at the moment I don't have the rated capacity capacitors can I change with the another with the total Q keeping constant, or I must compare it with total Energy ?

Manish

http://www.analog.com/library/analogDialogue/Anniversary/21.html

or something more easier

http://members.tripod.com/~gabevee/capacitor.html

Think of the capacitance as being the size (volume) of the capacitor and the voltage rating as being the strength. You could pump a lot of air into a champagne bottle: a wine bottle would simply burst; on the other hand you couldn't empty a cheap plastic bucket full of water at atmospheric pressure into a champagne bottle (it wouldn't fit).

For Switched Mode Power Supplies capacitors should be rated well above their terminal voltage. So for a terminal voltage of 12V I'd go for a rating of at least 20V.

If you've got a circuit diagram or PSU rating we can advise on whether or not you really need 2200 µF.

Do not be tempted to run a 10V-rated capacitor in excess of 10V. There is a risk of .

Instead, select and use a capacitor with a voltage rating that is above the maximum voltage to be experienced by the circuit.

Selecting a capacitor with a different capacitance will affect the behaviour of the circuit in ways that cannot be addressed by respondents without further circuit information.