Your trying to compare to many different things at once...
Some manufacturers will list the actual ESR value (in mR typically) but the only one you really need to take notice of his current rated in mA. Because the higher the current the lower the ESR anyway... You don't really need to know both figures.. Some manufacturers do quote both of them but not always..
Also physically larger capacitors have generally have a better ESR figure (given a similar voltage & uF specs) .. In particular with Panasonic they will do a standard version and a "L" (Long) version which will have better ESR figures (higher ripple current in mA).. So if you have the extra height you can use that one instead of the short version. Also mA (ripple current) is inherently higher the higher the capacitance value gets.
A Example what I mean is listed below.. This is comparing a Panasonic "M series" with a "S series" (this is probably not good as the S is a SMT part, but I'm just trying to point out the differences in series of capacitors and values)...
- 1.jpg (86.4 KiB) Viewed 5073 times
Where this basically shows a 470uF 25V capacitor with a ripple of 380mA.
- 2.jpg (140.72 KiB) Viewed 5073 times
And here we have same 225V 470uF, with a higher 480mA rating.
Maybe worth mentioning again actually, the SMT parts are generally bad ESR rating because they are physically small. And the 480mA (M series), will likely be physically larger giving better rating..
If that particular capacitor was twice the height, then the ripple rating would probably be something like 650mA just a example.
In any case, the higher that figure, the lower the ESR figure and the better the capacitor will be.. You really don't need to worry about anything else is if that figure is low then everything else should be good anyway.
Of course if you find a capacitor that is 2,000mA, though it is going to be a lot lower ESR figure and will generally be much better capacitor in all respects anyway.
It can get a rather complicated subject, really just only take notice of the mA figure.. Some manufacturers may list the actual resistance instead of the mA figure.. But this is generally one reason I like Panasonic as they are pretty consistent and just list the mA figure which makes life a lot easier... Trying to compare multiple things will just likey make you go insane
