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How to read Capacitors

Discussion in 'General Electronics Chat' started by SeanHatch, Dec 31, 2002.

  1. SeanHatch

    SeanHatch New Member

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    How do you find the values of disc-type capacitors, to me it seems there is no standard system. Some of the disc-caps I have read:

    uF
    3300

    Now I'm pretty sure this is just 3300uF, but on most of the disks, another system is used and it looks like this

    402

    I don't know what this means, just the number 402. Perhaps it is similar to resistor values? Thanks for your help if you can help me.
     
  2. isaacj

    isaacj New Member

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    It's kind of like resistor values. The first two digits are real numbers. The last digit is a multiplier. The value is given in picofarads.

    0 = 1
    1 = 10
    2 = 100
    3 = 1000
    4 = 10000
    5 = 100000
    6 = 1000000
    7 = 10000000
    9 = 100000000
    9 = 1000000000

    So 402 = 40*100 = 4000pF = 0.004uF
     
  3. SeanHatch

    SeanHatch New Member

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    Thanks

    Thanks I got it.
     
  4. dave

    Dave New Member

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  5. star882

    star882 New Member

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    WTF? :?
    3300uF is darn high for a disc cap.
    Please post a picture of that cap.
     
  6. kinjalgp

    kinjalgp Active Member

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    uF3300 means uF is the decimal spearator and its value is 0.3300 uF and not 3300uF.
    It is similar as it is with resistors 1k2 is 1.2k and k2 is just 0.2k. :)
     

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