reading a capacitor

[lerameur]

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
http://www.uoguelph.ca/~antoon/gadgets/caps/caps.html
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

 

[Tom Biasi]

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
http://www.uoguelph.ca/~antoon/gadgets/caps/caps.html
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

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

 

[Homer J Simpson]

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

A 22 uF ceramic would be a honking big SOB.

 

[Eeyore]

I thought 22J was read 22uF

Why exactly was that ?

Graham

 

[Ban]

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
http://www.uoguelph.ca/~antoon/gadgets/caps/caps.html
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

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!

 

[Alan B]

I thought 22J was read 22uF, this is using information from this web
site
http://www.uoguelph.ca/~antoon/gadgets/caps/caps.html

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%.