P Channel couterpart for IRFZ44

Discussion in 'General Electronics Chat' started by tracecom, Jan 4, 2013.

  1. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    I have looked but don't find an exact P channel counterpart for the IRFZ44 hexfet. Does anyone know what is the best choice? Thanks.
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    try irf4905
     
  3. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    That's the one I came up with as well, but I was thrown by the RDS (on) rating, which is .02Ω, versus 17.5mΩ for the IRFZ44. Does that matter?

    Thanks
     
  4. ScottWang

    Moderator

    Aug 23, 2012
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    The impedance is not much differce, but you should care the current and calculate the wattage.
     
  5. vrainom

    Member

    Sep 8, 2011
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    As far as I know a power p-channel mosfet will never have the same conductance as the power n-channel mosfets. It has to do with the intrinsic limitations of the doped material.
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    0.02Ω is 20mΩ. The difference between that and 17.5mΩ is 2.5mΩ. That is insignificant.
     
  7. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
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    Hmmm...I guess it's obvious that I read 17.5mΩ as 17.5MΩ. :(

    Thanks for clearing that up.
     
  8. Boky

    New Member

    Aug 30, 2014
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    Bit out dated theme but I was wondering same question, after some search, bellow you can see results :)

    They have some different Resistance values (IRFZ44 and IRF5305) but almost same input capacitances so they will turn ON and OFF almost in same time under same conditions :rolleyes:

    upload_2015-7-29_0-26-4.png

    upload_2015-7-29_0-26-25.png
     
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