NPN cross reference

Discussion in 'Electronics Resources' started by TexAvery, Oct 27, 2009.

  1. TexAvery

    Thread Starter Member

    Oct 7, 2009
    58
    0
    I am replacing a BF459 NPN transistor and can not find a replacement.
    Mouser says OBSOLETE
    Any clues where to cross ref?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,343
    Hello,

    That will be hard to find.
    It is a 300 Volts transistor.
    See datasheet.

    Greetings,
    Bertus
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You might use an MJE340.
    Same package, same voltage rating, but 5x the collector current and 20w vs 1.2w.
    It'll plug right in.

    An NTE157 is a replacement for the ST-BF459. However, you'll pay a lot more for it. Might as well try a better part.
     
    Last edited: Oct 27, 2009
  4. TexAvery

    Thread Starter Member

    Oct 7, 2009
    58
    0
    Thanks, I went to NTE.com for a cross ref. the ordered from Mouser.
    Mouser's LIVE ONLINE HELP was NO help at all.
    My guess is I only wanted 4pc.
     
  5. kgrigoleit

    New Member

    Jan 6, 2010
    3
    0
    I've also been looking for replacement parts for several obsolete components and I've had to plow through hundreds of data sheets to find similar items. Bertus and SgtWookie, do you have access to a site or data base where a person can find direct (or close enough) replacement parts without all the hassle?
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,638
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  7. peranders

    Well-Known Member

    May 21, 2007
    87
    0
    This transistor is rather alike BF469 and BF471 which I possibly have in my drawers. What is for? It is not equivalent with MJE340 which is much slower.
     
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