TIP42C Replacement

Discussion in 'General Electronics Chat' started by nar, Apr 27, 2010.

  1. nar

    Thread Starter New Member

    Dec 1, 2008
    7
    0
    Hi, I'm looking for a PNP transistor that can handle a higher continuous current (around 12a) but with the same basic operating charateristics of a TIP42C transistor. I'm not quite sure what I'm reading on the technical data sheets & how to narrow down my choices with there being so many transistors available.

    Thanks for your time & any replies or advice where to look is appreciated,

    -Nick
     
  2. Ghar

    Active Member

    Mar 8, 2010
    655
    72
    If you don't know what you're reading on a datasheet then how are you defining "same basic operating characteristics"?
    Are you just looking for a PNP power transistor?
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Why not look at an MJ2955 or TIP2955?
     
  4. nar

    Thread Starter New Member

    Dec 1, 2008
    7
    0
    thank you & I'll try the TIP2955 & see how it goes. Ghar the TIP42C I was using worked but would burn out. I need to take some classes or get some books on this stuff, I'm learning.

    thanks again,

    -Nick
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You may not have sufficient heat sinking.

    If you post your schematic, we might offer some tips on improving it.
     
  6. Norfindel

    Active Member

    Mar 6, 2008
    235
    9
    At what Vce are you using them? Take a look at safe operating area and power dissipation in the datasheet. Even if the mj2955 works at up to 15A, it wouldn't do that at full Vce. You can probably parallel transistors by using very low-value emitter resistors, like it's commonly done in amplifiers, to share the current and power dissipation.
     
Loading...