Product logo Zinc Oxid  Zinc Oxide Varistor
  Key Features

  • Extended temperature range up to 125°C
  • Higher Energy rating than comparable SiC Ceramics
  • Higher continuous Power rating
  • Dimensions and electrical values can be modified to customer requirements
  • Free of charge design service including technical drawing to international standards

Please find here all discriptions as pdf


General Information

After shaping, the varistors are sintered at high temperatures in specific ambient conditions. The HVR ZnO varistors have high voltage dependences and high current absorption. They are manufactured mainly as discs with varying sizes, as the required electric values are most easily obtained with these geometric dimensions.

Advantage of HVR SiC products

  • Varistor dimensions can vary in a wide range. Customer specified dimensions and solutions are possible as:
    • Presspack with several discs in series
    • ZnO big discs with soldered cooling plates
    • Customer adjusted voltage levels
    • Applications under oil and SF6 possible
  • Over 40 years of ZnO ceramic developement in our company. Our ZnO ceramic can bear the following temperatures:
    • Continuous 85°C
    • Short time 125°C
    • In case of failure up to 125°C