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Capacitor value.

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

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  1. WAZ

    WAZ Guest

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

    1.( 471 )
    2. (681)
    5.(223 with underline)
    6.(82J with underline)
    7.(473 Z)
    9.(.01 AEC)

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

    Waism Shaikh
  2. PeteS

    PeteS Guest

    I think you nay have asked this before

    471 = 470pF

    The code is

    1st significant digit
    2nd significant digit

    Answer in pF

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

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

    See for a
    decent overview

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


  3. HKJ

    HKJ Guest

    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.

    Or your can download this program:
    and enter the codes into the "Type number" field.

    It will both decode the numbers and letters.
  4. Eeyore

    Eeyore Guest

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

  5. PeteS

    PeteS Guest


    Gotta agree

    For the OP

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


  6. jasen

    jasen Guest

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

  7. Eeyore

    Eeyore Guest

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

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

  8. Rich Grise

    Rich Grise Guest

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

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

  9. Jamie

    Jamie Guest

    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:

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

    It shows 470pf as:

    0.00000000047 (farads)

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

  10. PeteS

    PeteS Guest

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

    Typical :
    Convert 0.01 microfarad to picofarad.
    Convert 2 pF to Farad

    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 :)


  11. Jamie

    Jamie Guest

    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.

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