Has Panasonic FK been discontinued?

[mockingbird]

I'm looking at Newark for 10mm Panasonic FK 16v 2200uF caps, and it's automatically redirecting to 12.5mm replacements with the text "suggested" replacement. All traces of said p/n has been wiped from their catalog (part number 32R8994).

It would have been nice if Panasonic or Newark had issued a discontinuation notice, because now all I have is the stock I have from my previous order. No 10mm 6.3V 3300uF FK caps either.

I wonder why they discontinued it.

[mariushm]

Re: Has Panasonic FK been discontinued?

It's still available

http://uk.farnell.com/panasonic/eeuf...tt=EEUFK1C222L

http://www.findchips.com/avail?part=EEUFK1C222L

EEUFK1C222L 2200/16 10x30 : http://industrial.panasonic.com/www-...EEUFK1C222L+WW

[mockingbird]

Re: Has Panasonic FK been discontinued?

Looks like Farnell has ceased making regular shipments from the UK warehouse to the US warehouse for FK series caps. I want to email them to let them know that I no longer have any use for them because the only reason I ordered from them in the first place was because they were the only ones that carried that particular series... Mouser is less expensive.

Panasonic's page for this particular cap shows RS and Farnell as having stock. Thanks a lot for the 'suggested' replacement of Panasonic FC Newark, now help me fit a 12.5mm cap in a spot that's meant for 10mm.

http://industrial.panasonic.com/www-...UFK1C222L+8+WW

[mockingbird]

Re: Has Panasonic FK been discontinued?

Newark will cease carrying most Panasonic FK series capacitors...

Luckily, they will continue to stock the 16v 2200uF 10mm cap often used for PSU repairs. Unfortunately the 10mm 6.3v 3300uF cap I often use for the 3.3v rail will no longer be stocked. I can use Samxon RS here, but it's specs just aren't as impressive as Panasonic FK. Oh well.

[SIDMX]

Has Panasonic FK been discontinued?

Too bad they're getting discontinued but it should be possible to mixing caps in the same rail to close match total ESR/impedance, pretty much as to what motherboard manufacturers have been doing in CPU VRMs... or i'm missing something?? I mean... both use L/C filters in outputs so what's the difference??

ie.-If using two FK 6.3-3300uf .025 ohm for one rail, total cap-added ESR/impedance to the circuit will be around .0125 ohm and if you put two 2700uf caps, one UCC KY .031 ohm and one Panny FR .018 ohm you should be adding .0113 ohm of ESR/Impedance to the circuit so it should work pretty much the same doesn't it?? ...assuming that 6600uf of bulk capacitance it's not really needed and even if it is you will be still inside the 20% tolerance but with new, good and long-life caps.

[mockingbird]

Re: Has Panasonic FK been discontinued?

Sid,

FK is not being discontinued. It's still very much in production. Newark however has decided to cease importing small monthly quantities from the UK warehouse... They're still carrying the 16V 2200uF cap, but all other stock will no longer be replenished.

Yea, I'll have to start using 10V 2200uF KZE caps because that's the only other 10mm cap I can think of... ESR of FK was low enough as it was, this is even a bit lower, 0.022 I think, but it should be fine.

[momaka]

Re: Has Panasonic FK been discontinued?

Yea, I'll have to start using 10V 2200uF KZE caps because that's the only other 10mm cap I can think of... ESR of FK was low enough as it was, this is even a bit lower, 0.022 I think, but it should be fine.

There's also the 10V 2700uF KY in 10 mm. KY is actually even better for PC PSUs.

[SIDMX]

Re: Has Panasonic FK been discontinued?

Sid ...FK is not being discontinued... They're still carrying the 16V 2200uF cap, but all other stock will no longer be replenished

oh, I missunderstood your post.

There's also the 10V 2700uF KY in 10 mm. KY is actually even better for PC PSUs.

...uh actually no, unless you're talking about their life rating, ESR/RC wise FK is better.

KY (10x30) .031/1910
FK (10x30) .025/2140

btw...are you sure that KY is 10V/10mm? I haven't seen that one.

[momaka]

Re: Has Panasonic FK been discontinued?

... hmmm. Might be 6.3V then, I forgot. Still works fine for the 5V and 3.3V rail in PSU's though.

Yes, FK is better spec-wise. But in PC PSUs, you don't really stellar ESR and ripple current specs anyways. Panasonic FC, which is just entry level ESR, is usually good enough. KY is tier better, and actually perfect for PSU use most of the time. KZE and equivalent works too, but anything lower, and you may actually be increasing the output ripple from the PSU. Also, some power supplies will become unstable with caps that have too low of an ESR. Older Sirtec/High Power platforms come to mind.

[Wester547]

Re: Has Panasonic FK been discontinued?

^ In the High Power/Sirtec PSUs I've seen, they usually use general purpose capacitors on the secondary whose datasheets don't even have an ESR rating and whose ripple rating is very low (from G-Luxon, Teapo, Rubycon, and even Jenpo). Did I miss something? Of course, I can only speak for the very old ones I've owned (which were 200-250W but lasted a very long time even with subpar and general purpose capacitors on the secondary, probably because they were massive overkill for the Pentium IIs they powered, which had almost no heat output). That said, in a very good design, a PSU will be such that it will not need to deal with much ripple so the rating that would arguably matter most is microfarad (so long as it isn't too high or low ESR and so long as the proper voltage is used).

Good to hear that Panasonic FK is still available, though.

[SIDMX]

Re: Has Panasonic FK been discontinued?

...you don't really stellar ESR and ripple current specs anyways.

Thats true, but there are PSU's like some Antec that came with 10x30 3300/10v TM Fuhjyyu's at .028/2030 (at least on paper) and altough a KY will be fine at only 3 mohm above, I think it's better to go with FK at 3mhom under spec, don't you think?

...I have to say that i don't have a scope so when recapping a PSU i just try to match as close as possible the specs of the caps I found inside.

[momaka]

Re: Has Panasonic FK been discontinued?

If you can get the FKs easily, then yes. Otherwise, I would just get the KYs and not stress about it too much. In terms of ripple output from the PSU, going 3 mOhms under could be just as bad as going 3 mOhms over (depending on the PSU design, of course). That said, you are right that it is better to go slightly under since the ESR of the caps will increase over time as they age.

[mockingbird]

Re: Has Panasonic FK been discontinued?

There's also the 10V 2700uF KY in 10 mm. KY is actually even better for PC PSUs.

That's an excellent idea momaka, using 2700uF caps for 5V and 3.3V rails in PSUs that use stock 3300uF caps... You're right, the capacitance probably isn't that important as much as the quality and spec of the replacement caps, and there are some nice 2700uF 6.3V 10mm caps commonly available.

[momaka]

Re: Has Panasonic FK been discontinued?

That's an excellent idea momaka, using 2700uF caps for 5V and 3.3V rails in PSUs that use stock 3300uF caps...

I missed that point.
No, the capacitance is actually very important. I wouldn't go under unless I have no other choice.

[mockingbird]

Re: Has Panasonic FK been discontinued?

I see... What do you think about using Nichicon HM or similar series for the 3.3V 5V rail? ESR is 0.012. Will the endurance be as good as Panasonic FK?

[momaka]

Re: Has Panasonic FK been discontinued?

I see... What do you think about using Nichicon HM or similar series for the 3.3V 5V rail? ESR is 0.012. Will the endurance be as good as Panasonic FK?

HM's ESR is a bit too low for PSUs as well. Avoid it unless there really are no other options. FK also has much better endurance, should the caps be ran near their maximum ratings.

[mockingbird]

Re: Has Panasonic FK been discontinued?

Just a heads up,

Thankfully, Digikey is now stocking a Rubycon ZLJ part equivalent to and even slightly better than the 6.3V 3300uF Panasonic FK in 10mm.

6.3V 3300uF Panasonic FK:
10x30mm 2140 0.025

6.3V 3300uF Rubycon ZLJ:
10x25mm 2250 0.024

If only Digikey had a 10mm 16V 2200uF cap, I wouldn't have to deal with Newark anymore. Their latest cost cutting measures has left me very unhappy with them, with the sudden withdrawal of important caps that we know of and probably a lot of other discontinued stock that we don't know of. They didn't alert anyone about anything, they just deleted them from their database in one fell swoop. They also removed the live support feature from their website... All very tacky business practice if you ask me. Instead of cutting away overpaid and redundant management, they trim the stock. As if their prices weren't so high already that they weren't able to maintain the status quo.

[rhomanski]

Re: Has Panasonic FK been discontinued?

I was actually happy with Newark when I needed a special capacitor once. 77mm. x 100mm. 80v and 22000mf. I found they stocked an Epcos at 100 volts and only 105mm tall. Farnell had it, with the $20 shipping fee, they came out to be $100 each. Mouser had the same capacitor for $200 dollars each. I needed two. I found Nichicon made one that would work but nobody stocked it. It was for an amplifier main filter caps. It came with Elna CE-W originally. The Epcos have performed flawlessly for about a year now.

[mockingbird]

Re: Has Panasonic FK been discontinued?

Yay! Newark has brought them back!

http://www.newark.com/panasonic/eeuf...-3v/dp/32R8958

Thank you Newark for listening to me. Now bring back the live support.