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  1. JohnDF

    PolySwitch (and other PPTC) advice needed

    Ah thanks. Cleared a few things up. This also bringss up another question I had, if you don't mind. In theory, a dead short would produce infinite current. But how much current will actually be produced if a short occurs? Will the PS simply output its max current? Will there be a very large...
  2. JohnDF

    PolySwitch (and other PPTC) advice needed

    Ah, pardon my ambiguity. These are the 5 and 12 Volt inputs that provide power to the board. Power is connected through pins on a backplane. I am beginning to wonder if at boundary temps, the PPTCs will not function properly as a fuse (Either not detect the fault or trip without a fault)
  3. JohnDF

    PolySwitch (and other PPTC) advice needed

    I am considering using some type of PPTC (specifically the PolySwitch by RayChem) as a "fusing" solution for a board I am designing. I am looking to provide protection on 5 and 12 volt lines. I'd like some input from others who have used this product before. After reviewing the data sheets, it...

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