I think i found just the right MOSFETs for an inverter.

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  • Th3_uN1Qu3
    Believe in
    • Jul 2010
    • 6031
    • Romania
    #1

    I think i found just the right MOSFETs for an inverter.

    IRF3205. 55 volts, 80A continuous current at 100C, 8 milliohms (yup, that's 0.008 ohms) RDSon, and a whopping 390 amps pulse current. $1.56 each in a local store. Parallel 4 of those and you've got the basis for a 3.5kW inverter. Or a DC-DC for a spot welder or something. Any other bright ideas as to what could be done with them?
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!
    Tags: None
    • severach
      Badcaps Legend
      • Aug 2007
      • 1055
      • USA
      #2
      Re: I think i found just the right MOSFETs for an inverter.

      An 85A diode comes in a DO-5 package, a bit slim for 85A but wouldn't melt the leads if cooled. Seems like 80A in a TO-220, TO-252, or TO-263 package would melt the leads within a few seconds.
      sig files are for morons

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        • Th3_uN1Qu3
          Believe in
          • Jul 2010
          • 6031
          • Romania
          #3
          Re: I think i found just the right MOSFETs for an inverter.

          Some CPUs use over 100A at their 1.2v or so. And you don't see VRM fets melted all that often. It's not like a diode with its huge voltage drop. It is gonna take more than four for 3.5kw continuous due to the dissipation limit, not due to the current limit.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

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