High current MOSFETs

Discussion in 'General Electronics Chat' started by samuel.whiskers, Aug 22, 2014.

  1. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
    95
    2
    I'm curious about what the catch must be with some MOSFETs and their current ratings?? I mean an IRF3205 states 110A in a TO-220 case.... I would imagine the pins vaporizing before 110A made its way through?? Even a short pulse at this current - really??
    Lee
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Those are so called bollocks numbers. In the IR datasheet there is a note 5 attached to that figure, which states "Calculated continuous current based on maximum allowable junction temperature. Package limitation current is 75A."

    So unless you are using the tab directly as one connection and the other pin is very very short and going into multiple huge thick pcb traces you will never get even close to those numbers.
     
  3. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
Loading...