Quote:
Originally Posted by Wind157
When putting a cap in parallel to increase its value, is that just voltage or capacitance too?
Have a paper cap that is .047 with 200 vdc. Can't find a cap that low with a minimum of that voltage. Found one that .05 but not sure if two would cause a problem
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Capacitance is the ONLY value that adds when capacitors are connected in parallel. The voltage of a parallel capacitor combination is that of the lowest sticker voltage rating of any single cap in the parallel group.
Big space to separate topics:
If you want to combine caps in a way that increases the effective voltage rating then you have to connect capacitors in series...However that only works for a group of caps that all have the same capacitance rating (if not then the voltage will divide unevenly in ways that are a pain to predict). Also if you put capacitors in series the capacitance drops. which can be calculated for any number of individual parts wired in parallel by the formula: Ct=1/[ (1/C1) + (1/C2) + (1/C3) + ...+(1/Cn) ] where Ct is the capacitance of the parallel combo and C1 thru Cn are the individual parts that make up the combo. The ... and Cn mean you can calculate your result for a near infinite number of different caps of different capacitances.
Do NOT buy surface mount capacitors for replacing paper capacitors. Buy ones like these (which I use).
https://www.mouser.com/ProductDetail...n1p2vhg7KKs%3d
good luck.