I need a more powerful transistor than the Power Transistor NEC B772 2SB772 TO-126 PNP

Discussion in 'General Electronics Chat' started by easytim, Aug 10, 2016.

  1. easytim

    Thread Starter New Member

    Aug 10, 2016
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    I want one that will operate with same spec's in the circuit but only at a higher output current.

    Please help, Thank You,

    Tim
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Welcome to AAC!
    Depending on your circuit you may find a P-MOSFET suitable. Many types can handle very large currents.
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,053
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    As Alec noted, a MOSFET may be better.
    What exactly is the application?
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,649
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    Hello,

    When you show us the schematic where the 2SB is used, we will be able to offer better advice.

    Bertus
     
  5. absf

    Senior Member

    Dec 29, 2010
    1,493
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    B772 is described as the output transistor used in 3W audio amplifier. The typical Ic(DC)=-3A and Ic(pulsed)=-7A.

    In that casing (TO-126) it is very hard to find one that exceeds 4A. But there are plenty that use TO-220 type casing.

    Attached is the datasheet of the transistor and the link below is the equilvalent (by computer) from Element14 with Ic(DC) > 3A. You can try digikey for the same engine if you're from US.

    Allen
     
  6. ci139

    Member

    Jul 11, 2016
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    some people just don't realize that even if they replace a component to the very same manufacturer,model,patch,and production line - they may have to readjust the circuit for it to operate in a fist place or operate as it should . . . this is hopless
     
    absf likes this.
  7. ci139

    Member

    Jul 11, 2016
    341
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    extract from the very NEC datasheet:
    CLASSIFICATION OF hFE
    Rank R Q P E
    Range 60 to 120 100 to 200 160 to 320 200 to 400
    + another thing that is crucial for switching applications is the VCE [image] -- this is why people here suggested using the MOSFET (but it likely requires modifying the circuit . . .)
     
    Last edited: Aug 11, 2016
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