# Capacitor value.

Discussion in 'Electronic Basics' started by WAZ, Aug 7, 2006.

1. ### WAZGuest

I have some basic quation about Capacitor question , i want to know wht
is the value of ceramic capacitor on which

printed
1.( 471 )
2. (681)
3.(047)
4.(104)
5.(223 with underline)
6.(82J with underline)
7.(473 Z)
8.(101J)
9.(.01 AEC)
10.(333K)

If you know any shortcut method for finding the value please , let me
know.

Waism Shaikh

2. ### PeteSGuest

I think you nay have asked this before

471 = 470pF

The code is

1st significant digit
2nd significant digit
Multiplier

Some are noted directly in uF, such as your number 9

The letters are tolerance. K = 10%, J = 5%

See http://www.ee.washington.edu/circuit_archive/capacitors.html for a
decent overview

Note it took me 5 seconds using google search to find that. Try it,
you'll like it.

Cheers

PeteS

3. ### HKJGuest

With the numbers it is very easy, the two first digits are the value,
the last digit is number of zeros, then your have the value in pF.

http://www.miscel.dk/MiscEl/miscelComponentTypeNumbers.html
and enter the codes into the "Type number" field.

It will both decode the numbers and letters.

4. ### EeyoreGuest

Number 3 also looks suspiciously like it might be .047uF too.

Graham

5. ### PeteSGuest

Oops

Gotta agree

For the OP

If it says .xxx it is VERY probably in microfarads.

Cheers

PeteS

6. ### jasenGuest

47pF ???
0.01uF = 10000pF
most of them read like the resistor colour code

Bye.
Jasen

7. ### EeyoreGuest

Maybe 0.047uF = 47nF ( 47000pF ) - not clear.

0.1 uF ( 100nF )
0.022uF ( 22nF )

Graham

8. ### Rich GriseGuest

Yeah - could be 040,000,000 pf. ;-)

How big is it? That should tell you a lot.

Thanks!
Rich

9. ### JamieGuest

I've had similiar questions, (what really throws me off is when I see sometimes 'u'
sometimes 'mfd' and I never know what's what!)

I wrote a web-script that's supposed to help with this, but.. as I myself often
get confused by this, I can't really confirm it's accuracy:

http://podtronic.podro.com/calc_unit.php

Hopefully(!) the above is somewhat useful, the result is in literal farads (or rather,
is supposed to be)

It shows 470pf as:

The idea was to produce a decimal that can be cut-n-pasted into a calculator or
something.

Jamie

10. ### PeteSGuest

In my long ago basic training, courtesy of the Royal Naval Air
Engineeering School, we had to do what felt like interminable
conversions.

Typical :

Wash, repeat interminably.

Keep in mind these were the days one could also still commonly find (in
a schematic) uuf (where u -> mu, so micromicrofarad) for pF, and the
term nanofarad was merely a theoretical possibility

All came in useful though

Cheers

PeteS

11. ### JamieGuest

I've never had any training, kind of wish I did though. It's an interesting
subject, ever since I was a kid I'd mess around with the stuff.
I think the math (and parts cost) were the two main factors pushing
me away from electronics as a professional career.

Too much math! (funny thing is, looking at it now, most of the math
really isn't that hard if you study it for awhile and maybe ask stupid
questions.. just rather tedious)

Have the same problem when I try to comprehend the Knuth books.

Jamie