Failing Dell 525W power supply question

[Half-Saint]

Hi,

I have a failing Dell power supply (from a Dell Precision T3400 desktop PC) with one confirmed (visibly bulging) bad capacitor marked 3300uF 16V LZP. All the other caps are Rubycon, this one is the only one that's not. Anyway, here's a potentially stupid question. Can I replace it with a 2200uF 16V low ESR cap? I know that in general this isn't recommended but if it's just a filtering cap, it could work? I can't provide a proper photo of the board because it's all cramped up and hard to get a good angle. If you guys think it might help, I can do my best to take some photos anyway.

Cheers,
H-S

[stj]

Re: Failing Dell 525W power supply question

no, what size is the cap?

[hartonoh]

Re: Failing Dell 525W power supply question

LZP elcap is a very low esr elcap, 22miliohm from the specification. If you change it with lower value, the esr will be higher, and the filtering action will be worse. I thing it will work with much more ripple, not a good solution

[Half-Saint]

Re: Failing Dell 525W power supply question

no, what size is the cap?

It's quite large: 3 x 1.25 cm

I'm looking at Rubycon 3300uF 16V ZL series as a replacement. It's slightly taller at 3.5 cm but same diameter.