Need replacements for Samxon HP

[Uranium-235]

Re: Need replacements for Samxon HP

I think I made a mistake, I ordered CS which has a very high ripple current measurement but is 100khz, it does have a freq coefficient for 120hz but I don't know how to calculate it

[Uranium-235]

Re: Need replacements for Samxon HP

Could someone find me a replacement for a 10v 2200f Capxon KM. MUST be from mouser, because I fucked up and ordered 1200 instead from digi-key. Mouse is local and I can will call pick up

They need to be 105c, 10mmD. It's an 886MArams

[Per Hansson]

Re: Need replacements for Samxon HP

For ripple current coefficient: the table in the datasheet is just the value you multiply by.
So if it shows "1" for 100Khz and "0.8" at 120Hz you multiply the rated ripple current with 0.8 to get what it is rated for at 120Hz.

As for the Capxon KM that is just a general purpose cap, this looks like a good replacement:
https://www.mouser.se/ProductDetail/...fElVGH5A%3D%3D

[Uranium-235]

Re: Need replacements for Samxon HP

For ripple current coefficient: the table in the datasheet is just the value you multiply by.
So if it shows "1" for 100Khz and "0.8" at 120Hz you multiply the rated ripple current with 0.8 to get what it is rated for at 120Hz.

I wondered if it was that simple. Glad to hear I was right. I did research on the subject but all I ran into was some more complicated formulas

As for the Capxon KM that is just a general purpose cap, this looks like a good replacement:
https://www.mouser.se/ProductDetail/...fElVGH5A%3D%3D

I saw those but never heard of that brand. Cornell (rest in peace man)-Dubilier I know of of but even some samxon series are total shit

[Per Hansson]

Re: Need replacements for Samxon HP

Plenty more caps to choose from:

https://www.mouser.se/ProductDetail/...7HvO%2Fg%3D%3D

https://www.mouser.se/ProductDetail/...8F61RdOQ%3D%3D

[Uranium-235]

Re: Need replacements for Samxon HP

Plenty more caps to choose from:

https://www.mouser.se/ProductDetail/...7HvO%2Fg%3D%3D

https://www.mouser.se/ProductDetail/...8F61RdOQ%3D%3D

Ripple is too low

[Per Hansson]

Re: Need replacements for Samxon HP

Hence why I linked the Würth capacitor.

[Uranium-235]

Re: Need replacements for Samxon HP

Hence why I linked the Würth capacitor.

Are they good quality? I guess I'm saying, are they Würth it?

[Per Hansson]

Re: Need replacements for Samxon HP

I've used them when recapping a dozen or so Siemens 440 Micromaster inverters without complaints so far, but it's only been around 6 months.
That said others on the forum have used them too and I've never seen any complaints!

[momaka]

Re: Need replacements for Samxon HP

Are they good quality? I guess I'm saying, are they Würth it?

LOL! Good one.

I've used them when recapping a dozen or so Siemens 440 Micromaster inverters without complaints so far, but it's only been around 6 months.
That said others on the forum have used them too and I've never seen any complaints!

For polymer caps - sure, I think Wurth are probably fine. Heck, even CapXon polymers don't seem to be troublesome in any way.

But when it comes to wet electrolytics, I still tend to be skeptical of these relatively "new" brands and prefer to stick to the known good Japanese brands... at least for now, until these brands "prove" themselves for a little longer. Not that the Japanese brands had a perfect track record either... but I still trust them a little more overall.

That aside, I don't see why go with a GP cap there. "Classic" low-ESR PSU type caps from UCC, Nichicon, and Rubycon are typically about the same price. So I'd go with any these.

UCC KY p/n: EKY-100ELL222MJ30S
https://www.mouser.com/ProductDetail...wHCDoBkg%3D%3D

Nichicon HE p/n: UHE1A222MPD
https://www.mouser.com/ProductDetail...AgLbFhFw%3D%3D

UCC KYA p/n: EKYA100ELL222MJ25S
https://www.mouser.com/ProductDetail...x5STEIQA%3D%3D

Nichicon PW p/n: UPW1A222MPD6
https://www.mouser.com/ProductDetail...sGYjabeQ%3D%3D

These should last a pretty darn long time and could probably even be reused afterwards in some other device. Also, they're in stock too.

Actually, if you wanted to go cheaper, there's these Rubycon ZLS caps:
https://www.mouser.com/ProductDetail...m3SkM05A%3D%3D
... but honestly, I think their ESR is a bit too low for PSU use. Probably will work fine, but you may get louder high-pitched whining from the PSU. Same deal with Panasonic FM/FR/FS - at least from what I've experimented with in LCD monitor PSUs... that is, ones that came with otherwise junky, just-barely-above-GP grade caps. If the PSU had UCC KZE or equivalent, then ZLS would be fine.

[Uranium-235]

Re: Need replacements for Samxon HP

You can go up that far for ripple? Yeah I was a bit concerned about using low esr caps for PSU's

[Uranium-235]

Re: Need replacements for Samxon HP

Also these samwha have this...interesting (melted?) plastic around one connector? They were sandwiched between two large fet hinksinks. Sign of going bad? Normal manufacturing for this sucky quality? Put my freaking iron on too long? (can't be that because the other one is fine)

[momaka]

Re: Need replacements for Samxon HP

You can go up that far for ripple? Yeah I was a bit concerned about using low esr caps for PSU's

You can go to the moon (and back) with the ripple current - it just states how much the cap can tolerate @ maximum rated voltage and temperature before it starts overheating internally. If the cap runs cooler, you can push even more ripple through it.

On that note, manufacturers rarely push the designs where a cap is stressed to near its maximum ripple current rating... but you never know, of course. In the case of the plasma board, they could have gone with CapXon KM simply because they were cheaper and just about "enough" for the circuit.

In regards to ESR, though - yeah, I try not to go too far anymore... if I can... unless the circuit wouldn't care about the changes (about half of the flyback/discontinuous designs don't, IME.)

Also these samwha have this...interesting (melted?) plastic around one connector? They were sandwiched between two large fet hinksinks. Sign of going bad? Normal manufacturing for this sucky quality? Put my freaking iron on too long? (can't be that because the other one is fine)

O.o
Check them with a tester, if you have one.
I don't think you could have done it with your iron, unless you really REALLY kept it on there for a very long time and at very high temperature.
The melting also seems to be on the positive lead of both caps, which suggests possible internal arcing from a bad connection.

If you don't have a tester, give them a charge with a 20V adapter from a laptop, then disconnect them from laptop adapter and short the terminals on the caps. You should get a nice spark. Depending on the capacitance of the caps, it should be somewhat loud too.
P.S. don't try this with a screwdriver or tool you care about - the spark may tarnish & pit the surface slightly.

[Uranium-235]

Re: Need replacements for Samxon HP

They seem to be pretty good graded (German-what's not to love?)

https://www.tomshardware.com/reviews...01,4193-5.html