2sk170 equivalent

Discussion in 'General Electronics Chat' started by lokeycmos, Jan 11, 2013.

  1. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
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    I need a 2sk170 jfet for a project. it seems to be discontinued. does anyone know of a substitute that would be in stock at digikey.com? thank you.
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
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    Thanks for the reply. Im ordering my parts from digikey.com. thats why im looking for a substitute.
     
  4. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Do you have a schematic where this 2sk170 is used?

    Wich version of the 2sk170 do you need?
    There are three versions:
    GR : Idss 2.6 - 6.5 mA
    BL : Idss 6.0 - 12 mA
    and V : Idss 10 - 20 mA
    The letters stand for the colors on the top of the FET.

    Bertus

    PS I have attached the complete datasheet for the FET
     
  5. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
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    the schematic is located here:
    http://revolutiondeux.blogspot.com/2012/07/mad-professor-snow-white-auto-wah.html

    It is an auto wah effects pedal. one schematic calls for the 2SK170 the other layout calls for a 2N5457. neither of these are in stock at digikey.
     
  6. bertus

    Administrator

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    Hello,

    Looking at the 2N5457, you need the an FET with a low Idss at Vgs=0 Volts.
    See the datasheet of the 2N5457.

    Using the parameter search to digikey, you might find something.

    Bertus
     
  7. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
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  8. bertus

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    Hello,

    Looking at the datasheet the j112 would be closer to the 2N5457.

    Bertus
     
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