Resistor types

Discussion in 'General Electronics Chat' started by mbek, Nov 7, 2011.

  1. mbek

    Thread Starter New Member

    Oct 30, 2011
    16
    0
    Hello,

    I'm in need of a non-wirewound resistor, and I've got a couple of them at hand, but don't know if they really are non-wirewound. One type is your regular shaped resistor (a bit thick though - 0.1Ohm, 1W), I suppose this one is carbon film?
    The other one is square shaped, 0.1 Ohm 5W - this one I found on the internet http://www.peccomponents.com/pca.htm and I think it is wirewound ("axial type" ?) but am not sure.

    Please advise, are these wirewound?

    Thank you.
     
  2. iONic

    AAC Fanatic!

    Nov 16, 2007
    1,420
    68
    They are ceramic encased, but the rest is unknown. I'd be guessing sand, but the datasheet doesn't readily offer an answer.
     
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  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    The square ceramic resistors are almost always wire wound.

    There are some wire wound resistors that the manufacturers classify as "non-inductive". These resistors have the resistive wire element snaking back and fourth along the length of the resistor, rather than wound around a core. There is still a small amount of inductance, but it is vastly reduced from a standard type wire wound.

    The 1-watt cylindrical could be either. If it were thick-film carbon or metal film, then it would be non-inductive.
     
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  4. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    They also make non inductive wire wound types which have two windings wrapped in opposite directions on separate layers that look exactly like a typical standard wirewound from the outside. Can't tell just by looking.
     
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