reading a capacitor

Sep 16, 2006 5 Replies

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lerameur 19 years ago

hello,

I am trying to read a capacitor I just purchased from digikey. it says on the package 22PF ceramic 5%. But when i look at it, i read 22J. I thought 22J was read 22uF, this is using information from thjis web site

formatting link

right under figure2, where it says: Other capacitors may just have 0.1 or 0.01 printed on them. If so, this means a value in uF. Thus 0.1 means just

0.1 uF. If you want this value in nanoFarads just move the comma three places to the right which makes it 100nF.

I dont think digikey would make a mistake, would they ?

thanks for clearing that

ken

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Tom Biasi 19 years ago

Hi Ken, I'm not sure what you are seeing. 22 J is a 22pF at 5%. The J means 5%, 22 with no other markings is in pF. Not likely Digikey would make that mistake. Sometimes capacitor markings can be confusing. Tom

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Homer J Simpson 19 years ago

A 22 uF ceramic would be a honking big SOB.

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Eeyore 19 years ago

Why exactly was that ?

Graham

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Ban 19 years ago

If you read on a few lines down, it says about NP0: ...or it may say N12 which translates to 120pF. Or 2p2 (2.2pF). I'm sure you get the idea... another indication of NP0 ceramics is a black stripe. They are all small in value, Tony says up to 120pF. So your interpretation was erraneous. And this is the dilemma with learning from web pages. You might understand something else and then -no feedback as in school is possible. If you already have some basic experience with components, you would immediately know, that a 22uF is much bigger. There is also the possibility to go to the Digikey website, get the datasheet for your capacitor and check for the printed designator, wow!

ciao Ban Apricale, Italy

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Alan B 19 years ago

On 15 Sep 2006 18:30:57 -0700, in message , "lerameur" scribed:

You've misread that site. From its "Figure 2" and the accompanying description, it is clear that it says a cap labeled "22J" is 22pF 5%.

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