2n3819 fet

Discussion in 'General Electronics Chat' started by tibbles, Oct 1, 2009.

  1. tibbles

    Thread Starter Active Member

    Jun 27, 2008
    249
    3
    while looking this fet up on the data sheets from 2 different manufacturers, the pinouts seemed to be different, am i going mad.?one had pin 1 for drain, one had pin 3

    regards
    dougal
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Yep, Fairchild sez DGS, ON has SDG. This was a wonderful problem with TO-92 packaged devices for years - you had to know who made the device to have the correct pinout, or else you test each transistor.

    The cure is to purchase from only one source and figure out which pinout you have.
     
  3. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Many Jfets like the 2N3819 are symmetrical. Their drain and source can be connected backwards with no difference in performance.
     
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