can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

wrote:
can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

Yeah, no problem. It 'used to be', but apparently modern electrolytics
don't have to be 'formed' at near their working voltage anymore.

jak

thank you for the info and your help

On Sun, 02 Mar 2008 10:22:22 -0600, jakdedert
wrote:

wrote:
can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

Yeah, no problem. It 'used to be', but apparently modern electrolytics
don't have to be 'formed' at near their working voltage anymore.

jak

On Sun, 02 Mar 2008 17:09:01 GMT, wrote:

thank you for the info and your help

On Sun, 02 Mar 2008 10:22:22 -0600, jakdedert
wrote:

wrote:
can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

Yeah, no problem. It 'used to be', but apparently modern electrolytics
don't have to be 'formed' at near their working voltage anymore.

jak
To add a little more info for the novices: the voltage rating of a
capacitor is just that, a rating, not a value. The difference is that
a rating is a maximum useage value. A capacitor rated at 250 volts
should not be used in a circuit that will see more than 250 volts, but
use in circuits with lower voltages is fine. Therefore a 350 volt
capacitor can be used in place of a 250 volt capacitor without
difficulty.

Good design practice calls for derating components, for instance to
not use a 250 volt capacitor in any circuit that applied 125 volts to
it. That would be a 50 percent voltage derating to improve the
reliability of the circuit. The same principle could be applied to
resistor and semiconductor power ratings, etc.

John

wrote in message
...
can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

If it's a polarized electrolytic do be sure to observe the polarity...


Mark Z.

thanks.......i appreciate the info

On Sun, 02 Mar 2008 15:44:00 -0500, John Bachman
wrote:

On Sun, 02 Mar 2008 17:09:01 GMT, wrote:

thank you for the info and your help

On Sun, 02 Mar 2008 10:22:22 -0600, jakdedert
wrote:

wrote:
can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor
without doing damage or does it have to be the same voltage?forgive my
ignorance but i am just getting into this...thanks

Yeah, no problem. It 'used to be', but apparently modern electrolytics
don't have to be 'formed' at near their working voltage anymore.

jak
To add a little more info for the novices: the voltage rating of a
capacitor is just that, a rating, not a value. The difference is that
a rating is a maximum useage value. A capacitor rated at 250 volts
should not be used in a circuit that will see more than 250 volts, but
use in circuits with lower voltages is fine. Therefore a 350 volt
capacitor can be used in place of a 250 volt capacitor without
difficulty.

Good design practice calls for derating components, for instance to
not use a 250 volt capacitor in any circuit that applied 125 volts to
it. That would be a 50 percent voltage derating to improve the
reliability of the circuit. The same principle could be applied to
resistor and semiconductor power ratings, etc.

John