I'm looking at ordering some caps from Digi-key for a busted thermostat and offered to get some poly's for a friend of mine. Are the nichicon poly caps as good as the United chemi cons offered here? He was planning on getting these RE50E821MDN1 to replace 11 rubycon MCZ 6.3v 1800uf.
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Re: Poly Brands
If any of those MCZ are not in Vcore then using Poly isn't advised.
If they are in Vcore then those would be fine.
No difference between UCC and Nichicon for polys.
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Re: Poly Brands
Thanks, I only ask because Nichicon has 6 different series listed on digikey and I didn't see a part # for the UCC on Badcaps for a direct comparison.Comment
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Re: Poly Brands
When I say no difference between UCC and Nichicon for polys what I mean is quality, not specifications.
You have to look at data sheets to compare specifications.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Poly Brands
Yes I know that is why I said I could not locate the part # for the UCC to make a direct comparison. He is going on the half capacitance rule with a high ripple current and low ESR. I just noticed that the UCC are PSC series so the specs on the Nichicons seem a bit better, 6.3A ripple vs 6.1A for the UCC and 5.0 mOhm vs 7.0 mOhm for the ESR all other specs are the same.Comment
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Re: Poly Brands
The half capacitance rule was a kind of early idea when polys first started to become viable for us recappers.
More is known now.
If you look at enough boards that came factory with poly you'll see want is really needed is to keep total uF in the Vcore over about 5000uF.
Higher end boards tend to have something over 6000uF.
Servers sometimes have around 7000uF.
If you have 11 caps in that Vcore then 680uF or even 560uF would be good enough.
The 820uF might be cheaper though, in which case I'd still use them.
N/A in this case but:
The thing to watch out for is that when you cut it in half it doesn't take total uF in Vcore below about 5000uF.
I've seen some cheap junk boards [like AsRock] with as little as 4500uF but [as usual] they were unstable.
Personally I like to keep it over 5500uF.
-- And of course ALL of that above assumes you are lowering the total ESR also or it's so low to start with the uF change doesn't matter.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Hello All, I have on the bench a couple of PSU's which have some failed Nichicon PL series caps. They didn't "puke" their guts through the top, but instead "diarrhea'ed" corrosive brown electrolyte through the bottom, down the legs and onto the board. On one cap, the electrolyte rotted the cap right off the board leaving 2 little stubs, and also corroded a trace on the foil side.
The PSU's are Power-One MAP series and are ringing-choke topology. The semiconductors have date codes in 1993. The PSU's were used in a commercial application, fan-cooled. They had failed... -
I recently acquired a set of Bose Roomate speakers from the mid to late 80's. Basically the right speaker cabinet is completely passive, and the left one has the power transformer and amplifier circuit in it. Out of curiosity, I opened it up to see what the circuit looked like. Looks like they used all Nichicon VX (2x 4700uF/16v for smoothing off the bridge rectifier), a couple random Nichicon SE series sprinkled on the board, and what really caught my eye - 2 yellow sleeved Nichicon caps (both 1uF/50v with no real series marking. Below are pictures of the caps. The only thing not shown in these... -
I've got a bunch of Poly VVX-250 VOIP phones that work fine as kind as long as they are plugged into the wall wart. Recently I got around to install a couple of TP-Link 5 port POE switches that are added to the existing plain Jane 24 port unmanaged switch. Great!!! Finally I am able to ditch the wall warts from these phones making more space on the desk, plus I am gaining some badly needed power outlets. So I thought.
Plugged in the first VVX-250 into the POE switch, booted up no problem. Plugged in the other Poly phones and they start to boot anywhere from 5 to 15 seconds,...11-25-2023, 10:46 AM -
Are there good brands for 'run capacitors' or 'start capacitors' that are used on electric motors or heat pump compressors? ... r are the good capacitor brands for electronics (power supplies, laptops, motherboards, etc.) also the good brands for run capacitors?
Yeah I know this might be a novice question, but I just wanted to be sure. I did do a search on the forum but did not see this question asked before.
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I want to calculate capacitor ESR referring to below guide.
https://forum.digikey.com/t/calculat...-from-tan/2633
I must find out dissipation factor(Tan(δ)) for nichicon lxj series(6.3v 1500uf,25v 1000uf ,10v 2200uf)
I finally found out datasheet which has all series of nichicon capacitor.But unfortunately, It removed old nichicon capacitor.
Is there anyone who still has old nichicon datasheet which has information of LXJ series?
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