PowerFlex 70, 700, 4, 40
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      3. PowerFlex 70, 700, 4, 40

      Why does my PowerFlex 40 fail after power has been cycled.

      The information gives possible reasons why a PowerFlex 40 may be failing after a power cycle.

      Excessive Heat Exposure can damaged critical parts of the PowerFlex 40 Drive
      • PCB Material: The PCB material used in the PF40 product is rated for heat stress at 105 degrees C. Discoloration subject to occur starting above 110C

      • Nylon Stand offs: This material rated for heat stress at 85 degrees C. Discoloration is subject to occur above 90C.

      • Failure mode of capacitor is consistent with exposure to heat stress
        • Bulge at top creating crown effect
        • Separation from PCB material at the solder point