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please identify this component

Discussion in 'General Electronics Discussion' started by linesix, Jun 6, 2014.

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  1. linesix


    Aug 13, 2009
    Hi guys,

    Can someone please tell me what is this? i cannot find any info in book and net.

    Attached Files:

  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    It's a SOT-223 package. The stylised 'F' logo is Fairchild (
    The markings seem to be "DF45 A56" and I couldn't find those using SMT package top marking searches.

    It's most likely either a MOSFET - one of these:,fff8007d,fffc002e,fffc0105
    ... or a junction transistor - one of these:,fff80078,fffc002e,fffc0105
    It could be a linear regulator. Fairchild make at least five in that package: FAN1086, FAN1112, FAN1117, FAN1616, and RC1117, but the data sheets don't say what the top marks are.

    If you can tell us about the device it came from, and upload a picture of the board showing where it came from, we may be able to help further.
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