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.