Rubycon USR capacitors rated 105C - Help! - diyAudio
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Old 6th January 2007, 05:41 PM   #1
Gigapod is offline Gigapod  France
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Default Rubycon USR capacitors rated 105C - Help!

I ordered four Rubycon electrolytic capacitors from China, 10000uF 63V.
I got them today, they seem OK, but are marked 105C.
(see pic)
And I couldn't find USR capacitors with a 105C temperature rating on the Rubycon website.
Should I worry or not?
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Old 6th January 2007, 06:37 PM   #2
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105 is good. Don't worry - just use them.
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Old 6th January 2007, 06:39 PM   #3
Gigapod is offline Gigapod  France
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Thanks CaliforniaBob!

I guess I am just becoming paranoid with so many fake transistors posts.
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Old 7th January 2007, 05:05 AM   #4
radtech is offline radtech  United States
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From what I can find (including Rubycon Datasheet), USR caps should be 85C. There's a thread on here that mentions this, do a forum search for "fake elna caps", the Rubycons USRs are mentioned on page 3.
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Old 17th January 2007, 10:50 PM   #5
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Hi All,

I too had bought 105 degree USR series caps for a fellow in China. These may be fake - as pointed out, the USR series is 85 degree only.

The caps I boughts were 47,000uF, 63V, 105 deg.

So I tested the caps. With a quick timimg test (you know, the time to charge to 63% of source voltage) I estimated the capacitors to all be slightly greater than 47,000uF. The highest being over 70,000uF. That would put if out of the USR +/-20% spec... The test was by no menas accurate, just an estimate, so I could be wrong on the tollerance.

Happy that they were indeed 47,000uF, I was worried about the 63V rating. I hooked one up to a 63V source and left it overnight. No problems. Repeated for all caps and found no problems. So, I'll conclude that they're not, say, 25V caps and assume that the 63V marking is correct.

They all hold a charge just fine. There are no massive leakage currents.

I haven't done an ESR test, but so far I'm actually happy with the caps, so I probably wouldn't bother. I also have not subjected them to a high ripple current.

So far they seem to be good caps. Are there any other tests I should run before relying on them?

Gigapod - did you use your caps, and how did they fair?

Cheers,

Dan
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Old 24th July 2007, 02:42 AM   #6
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Hello all!

I also bought four of those Rubycon 10000uf 63V 105C caps. I had already installed them in my Luxman L-450 when I started checking for info on the Rubycon website and failed to find anything about those USR 105C. So far my amplifier is performing quite well with those caps and everything seems to be up to snuff. Anybody having trouble with them?
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