MOSFETs with separate substrate pin

Discussion in 'General Electronics Chat' started by Granz, May 14, 2009.

  1. Granz

    Thread Starter Member

    Apr 27, 2009
    Does anybody have a line on MOSFETs that aren't internally set up with the substrate connected to the source? It seems odd that so many mosfets are configured that way. Why not allow the flexibility of connecting the substrate directly to ground, and having the source pin possible connected elsewhere? Especially when it's in a package with 4 pins!
  2. korntheuer

    New Member

    Apr 19, 2006
    sage.radachowsky likes this.
  3. sage.radachowsky


    May 11, 2010
    I have also looked quite a lot for enhancement FETs with separate substrate pins and only found those same ones. It's so good to get expertise from many people on this board.

    Plenty of depletion-mode FETs have separate substrate pins. Why is that?
  4. sirf

    New Member

    Sep 25, 2012
    I'm currently looking for a small signal N-channel depletion mode MOSFET with separate substrate pin, but have found none so far. Do you guys know how to find one? Most online part catalogues won't even let you filter enhancement/depletion mode when searching, let alone filter exotic features such as a separate substrate connection.
    Last edited: Sep 25, 2012