heat sink for 800A thyristor

Discussion in 'General Electronics Chat' started by aanchal, Jan 17, 2008.

  1. aanchal

    Thread Starter Member

    Jan 10, 2008
    if i want to replace an 800A watercooled disc type thyristor (for spotwelding m/c),with an air cooled thyristor with heat sink,what could be d rating of thyristor and the heat sink.can anyone suggest???
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    Air cooling is much less effective than water cooling. With that level of power (I squared times any R is huge), you would have to use multiple thyristors with large fan-forced heat sinks, plus the problem of synchronizing multiple triggering circuits. What could only be called a can of worms.

    I wouldn't want to try it unless there was absolutely no choice.