Replacement for oddball size KZG

[73buick]

Doing a repair on an AOpen board for a client. Replacing the line of KZG 6.3V 2200uf caps along the CPU. Now I ordered a set of Nichicon HZ from here, not really thinking about size, as the spec sheet for both the HZ and the KZG list them as 10x20. However, once I got the HZs, I realized they look wider that the KZGs on the board. Sure enough the KZGs on the board are 8x20, this size is not listed at all on the KZG spec sheets I have found online. I tried to make the HZs work, but there just isn't enough room. Looking around, the only thing I could find in a 8x20 are Nichicon HM caps (and ebay is the only place I could find them for sale). So now my question is this. The HM caps are rated 16/1950. The KZG caps are rated at 13/2550, but that is for the 10x20. I would assume the 8x20 ones I have would have a higher ohm and lower ripple rating, so my thinking is the HM caps should work okay. What do some of the experts here think and does anyone have actual specs for these 8x20 KZGs?

[PCBONEZ]

Re: Replacement for oddball size KZG

No.
Within a series, ESR and Ripple are related to the can size - NOT uf or volts.
The 8x20mm KZG is only .021/1870
.
The HM 8x20mm at .016/1950 is in fact an upgrade.
.
.
Look at -ALL- the 8x20mm or -ALL- the 10x20mm in either the HM or KZG data sheets and you'll see what I mean about can size.
.

[Topcat]

Re: Replacement for oddball size KZG

lets see some pics of those, I have never seen a 2200uF 6.3v KZG 8x20....infact I haven't seen an 8mm 2200uF cap since the KA7 days......

If they are indeed 8mm, stick an 1800uF 6.3v 8x20 in there, it would work fine....and sure beat cramming the caps and lead spacing...

[PCBONEZ]

Re: Replacement for oddball size KZG

I ~think~ I've run across 2200uF 6.3v KZG 8x20mm before, but I won't swear to it.
.
A lot of semi-recent FSP PSUs use 8mm 2200uF 6.3v Capxon.
IIRC they are KF series and not in the data sheet.
The mentioned HM is about the only option when a 10mm won't fit. (And they often won't.)
.

[severach]

Re: Replacement for oddball size KZG

Here's some interesting caps.

[Topcat]

Re: Replacement for oddball size KZG

Are those actually legit pannies? I've seen some really good fakes... What series are they?

[PCBONEZ]

Re: Replacement for oddball size KZG

FJ data sheet shows an 8x20mm 6.3v 2200uF.
.

[Topcat]

Re: Replacement for oddball size KZG

^
I'll be damned....haha

The last 2200@6.3 8x20 I saw were the crappy old JPCON and Jackcon in the Abit KA7's, circa 1999 +/-....and those were garbage. They remind me of the 4700uF 10x30 fukkyou caps in so many antec PSU's that I always replaced with 3300@16 10x30....I think I've also seen those in ltec in some acbel imac psu's as well.

[shovenose]

Re: Replacement for oddball size KZG

^
I'll be damned....haha

The last 2200@6.3 8x20 I saw were the crappy old JPCON and Jackcon in the Abit KA7's, circa 1999 +/-....and those were garbage. They remind me of the 4700uF 10x30 fukkyou caps in so many antec PSU's that I always replaced with 3300@16 10x30....I think I've also seen those in ltec in some acbel imac psu's as well.

Do you still carry those 10mm 16V SamXon caps perfect for Antecs?

[Topcat]

Re: Replacement for oddball size KZG

^
Yup, sure do. I've got plenty of them.

[Scenic]

Re: Replacement for oddball size KZG

A lot of semi-recent FSP PSUs use 8mm 2200uF 6.3v Capxon.
IIRC they are KF series and not in the data sheet.

I've seen those in be-quiet! E5 series PSUs, which are custom made by FSP (as in made by FSP, but not quite like any of their standard series)

edit: 2200uF 6.3V 8x25 CapXon KF in a be-quiet! E5-400 PSU. needless to say they're almost always bad

[73buick]

Re: Replacement for oddball size KZG

So you think some Nichicon HN 6.3V 1800uf will be okay?

[PCBONEZ]

Re: Replacement for oddball size KZG

That depends on what the specific cap does.
Sometimes uF matters. - And uF goes down as caps age...
.
You said 'by the CPU'.
If these are Vcore caps as long as the total uF is over about 5500uF you should be okay because you'd be lowering ESR too.
[And no, don't use less caps to get 5500uF. That would raise total ESR.]
.

[73buick]

Re: Replacement for oddball size KZG

These are the caps in question (this is not the board I'm working on, just a pic of the model).

[PCBONEZ]

Re: Replacement for oddball size KZG

I've seen those in be-quiet! E5 series PSUs, which are custom made by FSP (as in made by FSP, but not quite like any of their standard series)

edit: 2200uF 6.3V 8x25 CapXon KF in a be-quiet! E5-400 PSU. needless to say they're almost always bad

Yep, thems the ones.
I did an FSP 700 watt that had 8 or 9 of them scattered through it. - PITA.
Usually there's just a few at the OP filters.
.
.

[PCBONEZ]

Re: Replacement for oddball size KZG

These are the caps in question (this is not the board I'm working on, just a pic of the model).

You have 7 so 7x1800uF = 12600uF.
You'll be fine.
.
P4 and socket 604 & 771 & 775 etc.. only need about 5500uF in Vcore to be stable.
They end up with more uF in aid of using more caps in parallel to get ESR lower.
It's mostly about the ESR in Vcore, not the uF.
.

[PCBONEZ]

Re: Replacement for oddball size KZG

.
Now lets say the 3.3v rail on the board only had 2200uF caps.
Lowering them to 1800uF would shorten the time they could 'hold up' power up during a brown-out type power surge.
.

[73buick]

Re: Replacement for oddball size KZG

Thanks PCBONEZ.