2SK134 & 2SJ49 MOSFET replacement advice

Discussion in 'General Electronics Chat' started by mrdcoe, Mar 22, 2013.

  1. mrdcoe

    Thread Starter New Member

    Mar 22, 2013
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  2. crutschow

    Expert

    Mar 14, 2008
    13,009
    3,233
    The problem with finding replacements is that the originals are in a TO-3 case and those are not much made anymore. :(
     
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  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    3,807
    These parts are available on eBay as NOS. 15 to 20 usd each.
     
  4. rogs

    Active Member

    Aug 28, 2009
    279
    37
    Look for SEMELAB BUZ 900 and BUZ905 devices. These are direct T03 can replacements for the original MOSFETs you mentioned.

    It is important to remember that these are lateral MOSFETS, not the more common vertical type.

    Vertical MOSFETS will not work in this configuration.


    I don't think Mouser stock them. Newark do (or Farnell if you're in the UK)


    http://www.newark.com/semelab/buz900/n-channel-mosfet-160v-8a-to-3/dp/19M0049


    By the way, be careful when handling them the gate terminals are very static sensitive!


    There is another option. Look for Exicon lateral MOSFETS. They too do the same device, but in my own experience they are a little less reliable than the Semelab devices....

    See here: http://www.profusionplc.com/pro/gex/pcatdtl0?ipartno=ECF10N20
     
    Last edited: Mar 23, 2013
  5. mrdcoe

    Thread Starter New Member

    Mar 22, 2013
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    Thank you very much. This reply is helpful and complete. Best reguards...David Coe
     
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