Replacement for KGM ?

[Gabriel]

So I have been looking for replacements for Kmg 16V 100uF 5x11, they are rated for 110 mArms and a tan value of 0.20.

I've been looking at Rubycon Px 16V 100uF 5x11, rated for 130 mArms and a tan value of 0.20.

Only thing I perhaps don't like is that the Px is rated for only 1000 hours.
Should I worry about that ? the Px will be used on a mb right next to the pcie graphics card so they will be hot.

Anyone know of another series with a tan of 0.20 but with perhaps 2000 or more endurance time ?

[ben7]

Re: Replacement for KGM ?

So I have been looking for replacements for Kmg 16V 100uF 5x11, they are rated for 110 mArms and a tan value of 0.20.

I've been looking at Rubycon Px 16V 100uF 5x11, rated for 130 mArms and a tan value of 0.20.

Only thing I perhaps don't like is that the Px is rated for only 1000 hours.
Should I worry about that ? the Px will be used on a mb right next to the pcie graphics card so they will be hot.

Anyone know of another series with a tan of 0.20 but with perhaps 2000 or more endurance time ?

Nichicon PM

[Gabriel]

Re: Replacement for KGM ?

Pm is extremely low impedance, I need more of a general purpose type.

[ben7]

Re: Replacement for KGM ?

Pm is extremely low impedance, I need more of a general purpose type.

Fine then. Just use Nichicon VZ.

[Gabriel]

Re: Replacement for KGM ?

Vz is also rated for 1000 hrs just like Px.

[ben7]

Re: Replacement for KGM ?

Vz is also rated for 1000 hrs just like Px.

Well those are the only ones I have off the top of my head to offer.
What about panasonic FM?

[Gabriel]

Re: Replacement for KGM ?

Think Vx or Px will have to do, can't find any with same specs but higher hrs rating - looks like 5-6mm caps are only rated for 1000 hrs.

[ben7]

Re: Replacement for KGM ?

They can be rated at a longer life, like the Nichicon PM.

I think the PM will be fine...

[Gabriel]

Re: Replacement for KGM ?

I measured some Kmg in circuit and they all show up between 0.77 and 2.04, as esr is not available in their datasheet I do not know what their normal is as only a tan value of 0.20 but I think a esr of 0.35 for the Pm is too low.

[LLLlllou]

Re: Replacement for KGM ?

I measured some Kmg in circuit and they all show up between 0.77 and 2.04, as esr is not available in their datasheet I do not know what their normal is as only a tan value of 0.20 but I think a esr of 0.35 for the Pm is too low.

KMG doesn't list ESR because it's a GP series. Replacing a GP cap with a "low ESR" cap is not a problem in 99.99% of circuits. It's highly unlikely anything on a motherboard will complain about ESR being too low.

UCC KYA has 5000 hours for 5mm diameter 16V and up, and is available in 100uf 16v in 5x11.

[Gabriel]

Re: Replacement for KGM ?

I have allways chosen caps that are very close with the originals cap impedance no matter what - that is same or just below the original caps impedance.

Never thought changing a gp cap with a low esr cap would be a smart thing to do!

Where are these Kya's sold ?

[LLLlllou]

Re: Replacement for KGM ?

I have allways chosen caps that are very close with the originals cap impedance no matter what - that is same or just below the original caps impedance.

Never thought changing a gp cap with a low esr cap would be a smart thing to do!

Where are these Kya's sold ?

Hmm, that's actually a good question, neither Mouser nor Digikey stock them. Back to the data sheets.

[momaka]

Re: Replacement for KGM ?

I have allways chosen caps that are very close with the originals cap impedance no matter what - that is same or just below the original caps impedance.

Never thought changing a gp cap with a low esr cap would be a smart thing to do!

For these small caps, I am 100% confident you won't have any problems with low ESR cap replacements. Most of these caps filter the outputs of linear regulators, so as long as the capacitance is the same (or even slightly higher) and the ESR is not higher, any cap will work. I have doubled and tripled the capacitance on such caps (while also lowering the ESR substantially) on quite a few boards and it never really mattered. All boards worked fine (and still do) afterwards.

The only reason manufacturers use GP caps such as UCC KMG is probably because they are just a tiny bit cheaper than low ESR ones. So Nichicon PM will work fine.

[Gabriel]

Re: Replacement for KGM ?

I did buy the Px series and will use them for now, I guess the 1000 hrs lifetime of these will still be good as I guess they will see max 40-50 degress and 2000 hrs lifetime should be possible. By that time the mb will be replaced anyway.

If it should backfire I will use the Pm.