Friday, July 6, 2007

High Voltage Diodes

Issues:

  • Avalanche type is preferable, especially when using hv diodes in series, or if it is possible for a reverse voltage transient to appear across the diodes, such as resulting from an arc or flashover.
  • Greater forward voltage drop because a high voltage diode is comprised of multiple diodes in series, which enables the part to achieve a higher voltage rating.
  • Pay particular attention to creepage distance, and adhesion to whatever potting material is used.
  • Quality of the manufacturer is most important when evaluating diodes.

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