triac switch

Discussion in 'The Projects Forum' started by fisho, Nov 27, 2009.

  1. fisho

    Thread Starter Member

    Nov 4, 2008
    18
    0
    Hello there

    I've got to switch an AC load through triac. have only 8Ampc apacity
    (BT 139) .
    is it possible to double the capacity by connecting two in parralel?
    appreciate your help. the triacs are used only as On- off switch no phase angle no control is needed. just to short the MT1 with the gate.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    It's unlikely to work, as one will tend to hog current and heat up. Use a relay or a triac with some excess capacity.
     
    Last edited: Nov 27, 2009
  3. DickCappels

    Moderator

    Aug 21, 2008
    2,648
    632
    Or...look into current sharing methods for paralleled bipolar transistors. Beyond the bipolar analogy, I suspect you might have some problems getting both Triacs to turn on at the same time.
     
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