Samyoung LXZ, KME & KMF datasheets

[markcoenen]

Does any know of a source for SamYoung datasheets for series KMF, KME & LXZ?
I've looked in the databases I found in forum posts and google searches.
I have these datasheets NXP(LXZ), NHA(KME) & NZE(KMF), are they ok to use?

thanks

[mockingbird]

Re: Samyoung LXZ, KME & KMF datasheets

Just use their direct analogues which should be UCC KME, KMF and LXZ.

KME is general purpose 105C, KMF is general purpose 105C but with a 5000 hour endurance rating, and LXZ is non-aqueous low ESR starting at 2000 hour endurance.

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

OK, thanks
I still have 2 problem caps.

A Samyoung LXZ cap 25v 820uF size=10x20
In NCC's LXZ datasheet there isn't a 10x20 size
the closeist is 25v 820uF size=10x25 imp=0.045@20c & 0.090@-10c ripple=1,440

The Samyoung NXP(LAZ) datasheet
Has 25v 820uF size=10x20 imp=0.052@20c & 0.10@-10c ripple=1320
What ripple current should I use?


for a Samyoung cap 450v 150uF size=10x45 w/ case markings 0546 (M)105c
the NCC KMF series datasheet does not have an entry for 450v 150uF cap at any case size, only goes to 450v 47uF
The Samyoung series NFD(KMF) datasheet last 450v entry is 120uF size=18x40 ripple=740 (mArms/105c, 120Hz)
Any suggestions on ripple current for this cap?

I am a novice and this is the first time I am trying to select caps.
thanks for your help.

[mockingbird]

Re: Samyoung LXZ, KME & KMF datasheets

For the 10x20 LXZ, use UCC 16v 1000uF 10x20. The reason you can go down from 25V to 16V here is because 25V is never needed on secondary 12v rail supplies where the voltage will not exceed 12V. One of the only times you would actually only really need to pay attention to voltage is for the output of an unregulated DC voltage. An example of this would be the output cap after the bridge rectifier on a wall wart, where the voltage will fluctuate based on load, and a 12V adapter will exceed 16V when not loaded.

As for the lower ripple rating (1220 vs 1320), don't worry about that. These two series are direct analogues, so it's more than likely that Samyoung was just uprating the ripple value here a bit.

The KMF does not seem to be an analogue of UCC KMF as we originally thought, because in your case, it's a large cap which tend to have completely different series designations. And inndeed, Samyoung specifies NZE as a replacement series for their now deprecated KMF series.

for a Samyoung cap 450v 150uF size=10x45 w/ case markings 0546 (M)105c
the NCC KMF series datasheet does not have an entry for 450v 150uF cap at any case size, only goes to 450v 47uF
The Samyoung series NFD(KMF) datasheet last 450v entry is 120uF size=18x40 ripple=740 (mArms/105c, 120Hz)
Any suggestions on ripple current for this cap?

10x45 is impossible for that value, as the NZE datasheet specifies 18x45, and the KMF datasheet already specified 18x40 for a lesser capacitance. So most likely you meant 18x45 and not 10x45 (10x45 would be a very thin, long cap. Doubt something in that dimension is even produced for the masses nowaday with those measurements).

For a direct replacement, go for UCC KXG. The exact part number is EKXG451ELL151MM45S.

Good luck and please let us know how things go.

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

Thank you. The explanations are most useful. Knowing the “why” of it helps a lot.
This has been quite an arduous adventure. I’m into my 5 week of trying to order these caps. There is a lot more to replacement cap selection then I imagined, a LOT more. I am overwhelmed with information.

You are right the 450v 150uF cap is 20x45 I read my scale wrong. The part you recommended EKXG451ELL151MM45S is sold in quantities of 250 only. I found a Rubycon 1189-3226-ND on digikey that physically fits.
As for the Samyoung LXZ cap 25v 820uF size=10x20, after reading your comments I searched for a new cap using the lower ripple and found Digikey part P14423-ND.

Does that look good?

[mockingbird]

Re: Samyoung LXZ, KME & KMF datasheets

Thank you. The explanations are most useful. Knowing the “why” of it helps a lot.
This has been quite an arduous adventure. I'm into my 5 week of trying to order these caps. There is a lot more to replacement cap selection then I imagined, a LOT more. I am overwhelmed with information.

You are right the 450v 150uF cap is 20x45 I read my scale wrong. The part you recommended EKXG451ELL151MM45S is sold in quantities of 250 only. I found a Rubycon 1189-3226-ND on digikey that physically fits.
As for the Samyoung LXZ cap 25v 820uF size=10x20, after reading your comments I searched for a new cap using the lower ripple and found Digikey part P14423-ND.

Does that look good?

P14423-ND is certainly an adequate replacement. It's not a lower ripple part, but a much higher rated part at 2180. Just keep in mind that the ESR is much lower, at about 1/5 the original.

Yes, the Rubycon looks perfect too.

Good luck.

[Drack]

Re: Samyoung LXZ, KME & KMF datasheets

If it's an smps it could be a problem using a too low ESR cap, especially if it's old, the ripple can go really high because they are not designed for working with such a nice part (low ESR) weird huh?

[kc8adu]

Re: Samyoung LXZ, KME & KMF datasheets

is this a pc psu?
if so mockingbird is correct.
you did not state what you are working on.
often a higher voltage/larger can part is used to get the esr needed in a cheap part.

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

Thanks for your help.

It's a Samsung p2350 23" Monitor

I'm currently working on the Power Supply
It has these markings and labels

Printed
ITE Power Supply
LEVEL 3
LR76377

White paper label
MD54PWI2304SL (a)03393

Printed [this is the model # i used to find it on line with pix]
model PWI2304SL (c) rev 1.0

I found these 2 links with pictures
https://www.aliexpress.com/item/Free...060_10061_1006

and here

http://www.ebay.com/itm/Samsung-2494...IAAOSwd0BV193O

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

I'm also having problems finding a replacement for a
(JH) [Jianghai] cap BK series
100uF 450v 18x36
the datasheet says ripple 650 & ESR of 3.

The only one I've found is a UCC from Digikey where I would have to buy 200 of them. Digikey part # ESMH451VNN101MP35T-ND

Is this an unusual cap or something?
Could be replaced with something with different specs?
I think there is room for a 25x48.

http://www.digikey.com/product-detai...35T-ND/4002784

thanks again.

[mockingbird]

Re: Samyoung LXZ, KME & KMF datasheets

I'm also having problems finding a replacement for a
(JH) [Jianghai] cap BK series
100uF 450v 18x36
the datasheet says ripple 650 & ESR of 3.

The only one I've found is a UCC from Digikey where I would have to buy 200 of them. Digikey part # ESMH451VNN101MP35T-ND

Is this an unusual cap or something?
Could be replaced with something with different specs?
I think there is room for a 25x48.

http://www.digikey.com/product-detai...35T-ND/4002784

thanks again.

Here you go:

http://www.digikey.com/product-detai...386-ND/3134342

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

Thank You mockingbird.
I'm guessing that this is one of the times you can use impedance and ESR interchangeably.
But how did you know where to look? Is this something you get to know over time or did I miss something in how I'm searching for replacements?

thanks again

[markcoenen]

Re: Samyoung LXZ, KME & KMF datasheets

I just realized the JH cap is ripple=650 and ESR=3. I assume that is 3 ohms.
The datasheet for the Rubycon 1189-1386-ND does not list ESR but has a "Low Temperature Stability Impedance Ratio(MAX)" of 6.

Is that 6 ohms?

I'm not finding a definition to "Low Temperature Stability Impedance Ratio(MAX)".

Is that the same as impedance? Or, does the "Ratio(Max)" imply a formula?
If it is 6 ohms of impedance and we use that for ESR, is this still an appropriate cap? If so, why?

I find that there are 2 levels of understanding; understanding what someone is explaining to you and understanding something enough to explain it to someone else. It seems I'm not at the first yet. I'll get there, till then thanks guys.

[budm]

Re: Samyoung LXZ, KME & KMF datasheets

Monitor power supply: just use PANASONIC FM/FR series for the small cap.
The main filter cap (100uf 450V) if it is bad then just get one with the highest ripple current rating you can get, it is is exposed to 120HZ so ESR does not really matter much for that cap and its application.
That Rubycon TXW should be fine.

[budm]

Re: Samyoung LXZ, KME & KMF datasheets

Want to learn about the spec of the cap?
https://cdn.badcaps-static.com/pdfs/...64fb172f94.pdf