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FET Substitution

Discussion in 'Beginner Electronics' started by Steve Lewinsky, Jan 2, 2004.

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  1. If I wanted to substitute a FET, what are the characteristics that are
    critical for replacement? It is in a power circuit in a Monitor.
  2. Hi Steve,
    In a power supply, likely the most important characteristics are dissipation
    rating, on resistance (RDSon), drain-source breakdown voltage (Vdss), drain
    current (Id), and package type. International Rectifier
    ( is a major player in HexFet devices, and has an online
    selection guide. Start by finding the datasheet of the device you have.
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