2200uF 100V COG ceramic for under 10 cents

[Robert Baer]

Yes, that does seem to be the standard. Out in the rest of the world
however, it appears that it is written with a oh more often than not.
cog capacitor gets more than twice the google hits of c0g capacitor.

Well, ten million French *can* be wrong...

 

[Robert Baer]

I recall Bob Pease mentioning that DigiKey sells rather much larger
C0G values than that for reasonable prices, so now it's a challenge to
find what the largest really is...
it took well under a minute to find 445-2709-1, 0.22uF 50V, but none
in stock at the moment. On the other hand, 445-2708-1, 0.15uF 50V, is
in stock. It's an 1812 size SMT part, not too bad for size. The data
sheet suggests a volume that yields about 450 parts per cubic inch, so
you could get about 68uF at 50V per cubic inch, for about $400.
Quantity drops the price pretty quickly, so you can get 330uF/50V for
about $1500.

Cheers,
Tom

....and if you do not buy from Digikey, the price could be almost half!

 

[Fred Bartoli]

Robert Baer a écrit :

Well, ten million French *can* be wrong...

And as an idiot you are sure well on tracks.

 

[Ian]

Yes, that does seem to be the standard. Out in the rest of the world
however, it appears that it is written with a oh more often than not.
cog capacitor gets more than twice the google hits of c0g capacitor.

It's the same with np0/npo, 3x the number of hits for npo.

Regards
Ian

 

[Rich Grise]

Lots of people say oh when they mean zero when saying the
digits of a number. That doesn't make them right, but it is
something to understand that is a common practice.

I remember many years ago, being somewhat surprised to learn that
NPO is actually NP zero.

So, in X7R and Z5U, what do the letters and numbers stand for, or are
they just something somebody picked out of the air, like "heat numbers"
for bulk metals?

Cheers!
Rich

 

[Richard The Dreaded Libertarian]

Well, ten million French *can* be wrong...

Apparently, so can 62,040,610 Americans:
http://www.uselectionatlas.org/RESULTS/national.php?f=0&year=2004

Cheers!
Rich

 

[John Popelish]

So, in X7R and Z5U, what do the letters and numbers stand for, or are
they just something somebody picked out of the air, like "heat numbers"
for bulk metals?

First letter is minimum temperature rating, middle digit is
upper temperature rating and final letter is temperature
effect on capacitance over that range, independent of the
tolerance at zero volts and 25C.

http://xtronics.com/kits/ccode.htm

Note that at the bottom of this page they get C(zero)G and
NP(zero) wrong.

 

[charrid]

So, in X7R and Z5U, what do the letters and numbers stand for, or are
they just something somebody picked out of the air, like "heat numbers"
for bulk metals?

see http://en.wikipedia.org/wiki/EIA_Class_2_dielectric

It's all about range of operating temp. vs. cap. TC

e.g.
X7R capacitance will vary max +/- 15% over full mil spec range -55
°C to +125 °C
Z5U will vary +22% -56% over +10 °C to +85 °C, good for consumer
electronics

Don't ask me who dreamed the stuff up but I think it all goes way back
many years

Rich

 

[John Popelish]

First letter is minimum temperature rating, middle digit is upper
temperature rating and final letter is temperature effect on capacitance
over that range, independent of the tolerance at zero volts and 25C.

http://xtronics.com/kits/ccode.htm

Note that at the bottom of this page they get C(zero)G and NP(zero) wrong.

Correction... I sent them an email about the error,
yesterday, and it is corrected, today.

 

[Rich Grise]

Correction... I sent them an email about the error,
yesterday, and it is corrected, today.

I'm glad I held my tongue when I was about to make a sarcastic comment
about "credibility" or some such.

Thanks!
Rich

 

[John Popelish]

I'm glad I held my tongue when I was about to make a sarcastic comment
about "credibility" or some such.

I'm glad I checked back, since I got no return email. So
much ends up in the spam filters, that I had little hope of
getting through, let alone them taking my nit picks seriously.

 

[[email protected]]

First letter is minimum temperature rating, middle digit is
upper temperature rating and final letter is temperature
effect on capacitance over that range, independent of the
tolerance at zero volts and 25C.

http://xtronics.com/kits/ccode.htm

Note that at the bottom of this page they get C(zero)G and
NP(zero) wrong.

Correction... Did have it wrong. I sent them an email about the
error, yesterday, and it is correct today.

 

[[email protected]]

First letter is minimum temperature rating, middle digit is
upper temperature rating and final letter is temperature
effect on capacitance over that range, independent of the
tolerance at zero volts and 25C.

http://xtronics.com/kits/ccode.htm

Note that at the bottom of this page they get C(zero)G and
NP(zero) wrong.

Correction... Did have it wrong. I sent them an email about the
error, yesterday, and it is correct today.

 

[[email protected]]

First letter is minimum temperature rating, middle digit is
upper temperature rating and final letter is temperature
effect on capacitance over that range, independent of the
tolerance at zero volts and 25C.

http://xtronics.com/kits/ccode.htm

Note that at the bottom of this page they get C(zero)G and
NP(zero) wrong.

Correction... Did have it wrong. I sent them an email about the
error, yesterday, and it is correct today.