[morzh]

Ron

No. Ripple rating is the current that can be taken without exceeding a certain temperature rise.
And, as you probably know, anything connected in series sees the same current going through them. So every cap takes the same current.

Now with 5uF in parallel every cap sees half current but: a 5uF cap will likely have 1/4 current rating of 20uF cap.

Example:

EEU-EB2W220S by Panasonic.

http://www.mouser.com/ds/2/315/ABA0000C1024-947657.pdf

It has 560mA ripple @120HZ

If taking a 10uF cap, it has 310mA rating, roughly half.
There is no 5uF one in the series, and this is one of the highest-rated ones, if not the highest, but if it were, it'd probably go to roughly 1/4.

Now, paralleling two of them you achieve roughly 1/2 of the rating of the 22uF one, and serializing two 22uF ones you achieve 11uF with full current rating.