Author Topic: electrolytic capacitor new brand out of range  (Read 1080 times)

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Offline Groovy

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electrolytic capacitor new brand out of range
« on: July 23, 2016, 05:58:33 pm »
Hello,
I have a little problem with some capacitors i bought.
they are new brand and rated 470µf 10V it's polarized capacitor.
i tested them with some tools. a Chinese Fluke multimeter (Fluke 101) the MK-328 TR\LCR\ESR tester and a kit i got for 12USD (the IC is the atmega328P)
all of them show me a normal ESR but the capacity is really higher 680µf that's normal?

PS: i tested lots of capacitor new brand and they always are around the capacity that is write on them and also have a normal ESR

(sorry if my English is not really good i'm French)
 

Offline blueskull

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Re: electrolytic capacitor new brand out of range
« Reply #1 on: July 23, 2016, 06:01:30 pm »
Read cap's data sheet. Some caps are rated +30% -10% or so.
Also, some cheap caps, in order to give user a fake sensation of long lifetime, they have higher initial capacitance to compensate faster aging speed.
SIGSEGV is inevitable if you try to talk more than you know. If I say gibberish, keep in mind that my license plate is SIGSEGV.
 

Offline amyk

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Re: electrolytic capacitor new brand out of range
« Reply #2 on: July 23, 2016, 08:20:09 pm »
A leaky cap will often show high on capacitance meters.
 

Offline Groovy

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Re: electrolytic capacitor new brand out of range
« Reply #3 on: July 24, 2016, 07:33:18 pm »
Thanks for the reply  :-+

And yeah i see this is what i was thinking. that one is +60%
i have a good solution for electronic now. i can buy on Conrad's website. with them, it's sure the quality is ok
and the price good.
i was looking for a regulator (L7808CV) on ebay it's 1.60EUR (1.75USD) on Conrad it's 20Cts so.....
ebay for electronic part is really not a good solution it's ok for parts that are really hard to find

Thanks again for have reply to me :)
 

Offline 3141592

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Re: electrolytic capacitor new brand out of range
« Reply #4 on: July 24, 2016, 07:59:49 pm »
You might also want to try http://www.tme.eu/fr/, Conrad is quite expensive and limited in my experience, although I'm not in France. Farnell, Digikey (shipping may be pricey) might also be options. Compare prices, if you need something expensive.
 

Offline Groovy

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Re: electrolytic capacitor new brand out of range
« Reply #5 on: July 25, 2016, 12:56:35 am »
ok! cool
Thanks :)
i'm going to look on it. it's on my bookmark ;)

i know Mouser but it's impossible to buy there for me the shipping is really too much but yeah, that's on the USA it's really bad because they have really lot of things that i can't get easily here. also, i think i already look at Farnell and Digikey and yeah, the shipping....
Thanks for the help :-+
 


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