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What am I looking at?

Discussion in 'General Electronics Discussion' started by tth, May 28, 2011.

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  1. tth

    tth

    1
    0
    May 28, 2011
    Hi all,

    I am attempting to replicate a board which is no longer manufactured, and am identifying components, I have done all but 1, and was hoping someone might be able to help.

    I have attached a picture, it's the round black component (looks much like a capacitor) Printed on the board is PTC200

    Printed on the component is "bTh 150" or "bTn 150"

    Many thanks in advance

    /Tom
     

    Attached Files:

  2. poor mystic

    poor mystic

    1,074
    36
    Apr 8, 2011
    Hi
    looks like a blurry photograph of a positive temperature coefficient thermistor, or "spike eater", often used across the mains to absorb high-voltage spikes.
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,505
    2,849
    Jan 21, 2010
    I agree on both of those. It's definitely blurry, and the board seems to indicate it's a PTC. In fact there appear to be 2 or three PTC's.

    PTC's are not really spike eaters though. Here is a url that describes their uses.
     
  4. poor mystic

    poor mystic

    1,074
    36
    Apr 8, 2011
    Thanks *steve*
    I must be living in the olden days
    Mark
     
  5. shrtrnd

    shrtrnd

    3,826
    526
    Jan 15, 2010
    Ouch, that 'cycles' us old folks.
    ('Hertz')
     
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