Capacitor Replacement: Advice Needed

[Uy181]

So I have a couple motherboards I am recapping that I do not have capacitor replacements already in my used inventory. I am wondering which capacitors that are currently in production for 2022 that I can use to replace the following capacitors:

"SAM YOUNG" NXC series 6.3v 3300uf
"Nichicon" HM series 6.3v 1000uf
"Nichicon" HM series 6.3v 3300uf
"United Chemi-Con" KZG series 6.3v 820uf
"TK" ATWY series 6.3v 820uf

Thanks!

[stj]

Re: Capacitor Replacement: Advice Needed

you probably need to use polymer caps for that

[Uy181]

Re: Capacitor Replacement: Advice Needed

For the 6.3v 3300uf HM series, I spotted a 6.3v 3300uf UHW series that matches the ohms and ripple current rating "close enough" but the 6.3v 1000uf UHW doesn't quite match the HM spec close enough. Are there any guides out there for replacing electrolytics with polymers? The values and specs to look out for. These 6.3v 1000uf caps aren't VRM caps. They're the ones I suspect that are on the 5v rail as there's 10+ of them on each board. The polymer caps I am looking at I'm not sure if they'd work as the spec on the datasheet says they are 6 mOhms at 6.3v 1000uf as opposed to the 28-30 mOhms on the HM series and have a very high ripple current and I don't know if a higher ripple current rating will affect anything. What values should I be looking for?

[stj]

Re: Capacitor Replacement: Advice Needed

higher ripple is better - it's the ripple it can handle.

so higher ripple = better
higher voltage = o.k. but not really needed
higher capacitance is o.k. but not needed
higher resistance = BAD, lower is better