Locating Caps for MOBO

[elbtax]

I have checked Mouser, Digikey & Newark. I am looking for Rubycon 1800uf,6.3v,105c MCZ series in 8x20mm can. I only need six for a ASUS? P4SD-LA mobo out of a HP comp. It had the above caps which were all blown.(Next to the CPU) The remaining caps all look good and are Rubies.
Maybe a suitable replacement would be o.k. I have some Nichicon but the can is to large (10x20mm) to fit all six in thier respective places. Thanx for any input.

[elbtax]

Re: Locating Caps for MOBO

Found some nichicon caps at Mouser. They have the HM,HN and the HZ in the correct size. Which one is the best?

[kc8adu]

Re: Locating Caps for MOBO

hm and hn are a problem .
dont know about hz.
we get tons of mobo's with failed hn and hm.
i poly the p4 boards that use the 1500-1800 8mm parts.i use 820@2.5

[elbtax]

Re: Locating Caps for MOBO

Thanx for the reply Kc.

[elbtax]

Re: Locating Caps for MOBO

found some nichicon 8mm. They are 1000uf,10v. These should be ok to use? They are hm but this is a non-paying job and i just want to get the board going. If it last 6 mos i will be happy.

[chipper]

Re: Locating Caps for MOBO

check out this thread for Panasonic caps ;
http://cgi.ebay.ca/50-Panasonic-6-3V...QQcmdZViewItem

[PCBONEZ]

Re: Locating Caps for MOBO

Those are FL series.
I only have specs on two sizes but those two are rated the same as MBZ.
- Good caps.

[Newbie2]

Re: Locating Caps for MOBO

Get the Nichicon HZ capacitors. I heard they are suitable for motherboard use.

[PCBONEZ]

Re: Locating Caps for MOBO

HZ are about the lowest ESR you can get without going to solid poly.
Should be able to find Panasonic FJ in 8mm too on eBay.
Those would be fine.

[sofTest]

Re: Locating Caps for MOBO

check out this thread for Panasonic caps ;
http://cgi.ebay.ca/50-Panasonic-6-3V...QQcmdZViewItem

I would be careful with that vendor. Please note that he don't say anything about series in the description. If you look at the negative feedbacks, the term fakes frequently pops up. After seeing this, I sent him a question if the capacitors he sell where genuine Panasonic FL/FJ-caps, but he didn't reply. Google goodbuy711 + fakes for more.

I ended up ordering from another eBay-vendor, PC MotherBoard Capacitors Store, after I found that forum member stevo1210 had good experience with this vendor.

[kc8adu]

Re: Locating Caps for MOBO

thats the shithead who sold a friend fake 2sc1971.
the 1971 is a vhf rf power transistor.what is unique about it is the center pin/tab is the emitter.
the ones he got were bce rather than bec basing.
the real parts are in a varient of the to-220 case too.
fakes stick out like a sore thumb!
why not get in touch with topcat and get known good parts and help support the forums too?

[MixMasta]

Re: Locating Caps for MOBO

hm and hn are a problem .
dont know about hz.
we get tons of mobo's with failed hn and hm.
i poly the p4 boards that use the 1500-1800 8mm parts.i use 820@2.5

Nichicon HM, HN, and HZ are on the badcaps.net list of good caps. Why is there a discrepancy here?

https://www.badcaps.net/forum/showthread.php?t=2280

[PCBONEZ]

Re: Locating Caps for MOBO

If you will please read the date on that post -> 03-01-2006
That list was made before the problems with HN and HM were known.
Only HN and HM with date codes between 2002 and 2004?/2005? had the problem.
2006 and newer, 2001 and older - should be fine.
.

[MixMasta]

Re: Locating Caps for MOBO

You're almost right, it was "Last edited by willawake : 02-14-2007 at 06:16 PM."

But you see here in 2008 someone (who is obviously very knowledgeable) is recommending against them.

[PCBONEZ]

Re: Locating Caps for MOBO

If date codes are 2002 to 2004 don't use them.
Some say to 2005.
Oddles of posts about the problem.

[kc8adu]

Re: Locating Caps for MOBO

gotta watch out on ebay.lots of old stock there.
many sellers dont specify datecodes.
so i would be wary of hn,hm,hz on ebay.and always watch out for fakes.

[PCBONEZ]

Re: Locating Caps for MOBO

I've seen HN/HM on ebay with bad date codes.
Have seen 3 dealers with fake Sanyo WG.
Saw a lot somewhere with a 1979 date code.

Haven't seen a problem with Hz.
Is there one?

[linuxguru]

Re: Locating Caps for MOBO

HZ is fairly recent (2-3 years), and no problems have surfaced yet. HM dated 2005 and later, with white text on black sleeve, is fine, and I'm using them to recap Vcore caps. I don't know if there is any safe batch of HN, and if so, the safe date ranges, so I'm skipping them for now.

For locations without high ripple current, like Vdimm or Northbridge bypass, Nichicon PW, PL, PM, PS, etc., and Panasonic FC, FM, FK should work just fine.

Panasonic FJ is an excellent all-round motherboard cap, with extremely low ESR and excellent durability. 1800uF/16v/10mm is as close to a universal mobo cap as you're ever going to find.

[PCBONEZ]

Re: Locating Caps for MOBO

Nichicon did two press releases about the HN and HM problems in mid 2004.
That is why I think 2005 HM/HN are okay. Problem fixed by then.
[Other folks in here have had 2001 and 2005 date code failures and say that those are bad too. I think those are not related to the manufacturing problem and are heat related failures.]

One release stated that some batches of HN and/or HM where produced where the electrolyte had been contaminated with some chemical. (A cleaner or disinfectant as I recall.)

The other release said one plant was overfilling HN and HM from 2002-2004.

So there may be good and bad batches during that time.
But Nichicon did not publicly release exact dates or batch numbers for the problem caps.

Simply best to stay away from HN and HM with 2002-2004 date codes.
2001-2005 if you're paranoid.

.