4700uF 6.3v and 3300uF 16v in a 10mm Diameter

[Topcat]

Where can I get them these days? My usual sources are a no go in a 10mm, 12.5mm is too big. I'm recapping an old Antec rackmount PSU for a client (SmartPower SP2-450SXR) with a bunch of spooged Fuhjyyu crap caps, and he's insisting it be repaired....which is fine by me, I make more on it that way.....but I need to find these illusive caps....it's been a long time since I've needed these values....and now I can't find them. Odds are I could get away with 3300uf in place of the 4700uF, I've done it before...but if there's a source for them in 10mm, I'll try to stay original.

[jayjr1105]

I like ZLQ's for a lot of things.
https://www.digikey.com/en/products/...C10X25/6049993

[momaka]

Looking through my datasheets... yeah, it seems Ruby ZLQ is pretty much the only option at this size and capacitance (at least for the 6.3V, 4700 uF caps), unless you know someone who has custom-ordered caps (Behemoth, perhaps?)

Panasonic FS seems to be a 2nd runner up, if you don't mind bumping down the capacitance for the 4700 uF caps to 3900 uF (instead of 3300 uF.)

As for 3300 uF, 16V caps in 10 mm dia... I couldn't find anything to fit from my datasheets. Will definitely need a custom size for that one, I think. Or maybe you can somehow find a way to wedge a 12.5 mm cap in there. I'm guessing you're all out of Samxon RS by now. :\

Also, the other thing I wonder about is how the ESR of ZLQ and FS will play with the circuits in that PSU. More than likely it will work fine. Though it is worth noting that both Panny FS and Ruby ZLQ caps have ESR/impedance close to that of United Chemicon KZE - a series that is often used in a lot of modern PSUs, but rarely seen in any old units that generally favor more entry-level low-ESR caps (if not outright GP caps.)

[jayjr1105]

3300uf 16v 10mm if you can find them EKMG160ELL332MJ40S

https://www.mouser.com/ProductDetail...X9wDF2QA%3D%3D

[Topcat]

digikey is annoying me in that the 4700uf zlq didn't show up when I searched. I also never knew there was a KMG 3300uF 16v 10mm X 40mm that wasn't a special order. I love learning things!!

[jayjr1105]

Originally Posted by Topcat

digikey is annoying me in that the 4700uf zlq didn't show up when I searched. I also never knew there was a KMG 3300uF 16v 10mm X 40mm that wasn't a special order. I love learning things!!

Check the datasheet, I'm not seeing 10x40mm

[Topcat]

Originally Posted by jayjr1105

Check the datasheet, I'm not seeing 10x40mm

From your own link:
https://www.mouser.com/ProductDetail...X9wDF2QA%3D%3D

[jayjr1105]

Originally Posted by Topcat

From your own link:
https://www.mouser.com/ProductDetail...X9wDF2QA%3D%3D

I mean I don't see 10x40 anywhere on the data sheet. Maybe Mouser has their data messed up? I can't tell you how many times I see 10x25 on the datasheet then the cap comes and it's 27mm tall.

[Topcat]

Originally Posted by jayjr1105

I mean I don't see 10x40 anywhere on the data sheet. Maybe Mouser has their data messed up? I can't tell you how many times I see 10x25 on the datasheet then the cap comes and it's 27mm tall.

The height doesn't really matter, plenty of clearance....the diameter is what mattered, they're packed in there crazy tight.

[momaka]

Originally Posted by Topcat

I also never knew there was a KMG 3300uF 16v 10mm X 40mm that wasn't a special order. I love learning things!!

Interesting, I also didn't know that KMG series have a 16V, 3300 uF in 10 mm dia. cap. Then again, I also tend to ignore them quite often on Digikey and Mouser, simply because they are GP series (hence, technically not good enough for PSU.) On the other hand, since you'll be replacing Fuhjyyus that aren't really that much better rated than GP caps, this probably might not matter much.

Originally Posted by kaboom

Wouldn't surprise me if the stupidpowers' "4700uf" on the sleeve were one or two standard values lower.

It's possible.

But I find Fuhjyyu caps tend to be accurate about the capacitance on their label... when they are not failed, of course.
And in that regard, it seems that Fuhjyyu just uses crap quality materials, which makes their caps very unreliable (unable to withstand heat stress and also breaking down in use over time.) However, of the many many F-u caps that failed, a select few do seem to survive... and IME, or at least from what I have in my salvage bin, those have been OK, surprisingly - even after using them for many years in various temp recap projects. Unlike Teapo SEK and SC series, at least these don't bloat by themselves when sitting on the shelf. With Teapo, I always have to reform them and check them on the cap meter... and even then that guarantees nothing. Then there's CapXon and Ltec I don't trust those even for a temp recap. Non-stressful breadboard projects is as far as I take them.

By the way, anyone remember the 1650 uF -rated Fuhjyyu?
https://www.badcaps.net/forum/showth...highlight=1650
Maybe I should list it on eBay as "vintage rare special cap with warm musical sound"

[lti]

Most of the unusually small caps I've seen measured low, but still (barely) within tolerance. I did see a few that measured extremely close to the rated capacitance, like a 2200µF 25V 13x20mm that measured almost exactly 2200µF.

[Per Hansson]

Yea I would also not use KMG in a modern PSU, General Purpose caps do not belong there.

[Topcat]

Originally Posted by Per Hansson

Yea I would also not use KMG in a modern PSU, General Purpose caps do not belong there.

This PSU has to be a good 15yrs old....I don't think it would qualify as 'modern'...

[momaka]

Originally Posted by Per Hansson

Yea I would also not use KMG in a modern PSU, General Purpose caps do not belong there.

I think it just depends on the topology a little bit.

Even if it's a new PSU, if it uses an oldschool half-bridge design (which I know a lot of older CWT-built Antecs did), chances are you could probably get away with KMG or other GP 105C caps, simply because the switching frequency will likely be relatively low. Of course, there is a little bit more to it than that. (For example, the PSU transformer ratios can be designed to output higher voltage pulses with narrower width to get more "oomph" out of the switching transistors. This will put higher stress on the output caps and inductors. So that's one example where even a relatively low switching frequency PSU may benefit from low ESR caps. But even in those cases, GP caps with enough capacitance and adequate ripple current rating for the circuit should still handle the stress OK.)

[pc7fan]

They used KMG for a reason, those aren't areas that require high ripple current, thus 105° GP caps deem appropriate for decoupling. I have also seen good 10mm 16/3300 and 6.3/4700 Fuhjyyu TN that indeed tested around 3300 and 4700 respectively in old SP Antecs and Apevias. Since Fuhjyyu TN are general purpose, reducing to 3300u low-Z caps shouldn't be an issue whatsoever, plus that may reduce the risk of oscillations and will roughly match in ripple current ratings.

[Per Hansson]

Anything with a high switching frequency I mean, it was designed for low ESR capacitors.

[Topcat]

I just dissected a Zippy / emacs (model R2W-6500) for another project I'm working on, there's quite a few KMG's in it. It's probably circa 2010 (it was running a 5400 series Xeon system). It's a high-time PSU, its a redundant server supply, working fine. Most the ones in the secondary are KZE and KY. The reason for the dissection was I'm repuropsing it for something less demanding and wanted to quiet the fans down. They're 8500RPM feeding off the +12v rail. Much quieter feeding from the +5v instead!

[mockingbird]

Our forum member Behemot sells custom made UCC KZN 16V 3300uF capacitors which are 10mm and quite tall and I highy recommend them.

He sells them through his Bonanaza store, or through his website.

He also carries Samxon RS in 16V 3300uF, but their spec is not as impressive as KZN. You're already familiar with those.

Originally Posted by kaboom

Has it ever been established that the fudgies were in fact their stated values when new? Remember, we're only seeing these antecs after failure or when in for recapping.

Yes, they were in fact 4700uF. Don't bother trying to find 10mm 6.3V 4700uF caps. Just use 3300uF caps there.

[Topcat]

I thought RS's were discontinued....I haven't been able to get them since Joe Lo (bigpope) went MIA. I do like the specs of the KZN better for sure though.

[mockingbird]

Originally Posted by Topcat

I thought RS's were discontinued....I haven't been able to get them since Joe Lo (bigpope) went MIA. I do like the specs of the KZN better for sure though.

I'm still in touch with Joe on occasion. You can still reach him through the Chinese apps. Last I spoke with him he said he could still get Samxon but I think I decided to go with local alternatives at the time instead.

Yea Behemot's RS are legit and newer stock than Joe's. He did a custom order on them as well a while back. I used them in a Socket370 VRM high last week along with some NOS Nichicon HZ for the VRM low.