High energy industries

Since, as the only producer in the world, KEKO VARICON manufactures nothing but the overvoltage protection components, it is obvious that it closely observes the trends in the environment protection, the use of energy and heavy industry.


  • Traffic and railway signal systems
  • Power distribution control equipment
  • Railroad equipment
  • Mobile power supply stations
  • Switch boards
  • Power supplies and motor controls in transportation
  • Industrial and consumer electrical equipment

Available Product Series:


  • Varistors for Class I, II &III according to UL 1449, IEC 61643-11
  • Very low leakage currents
  • Custom electrical performances
  • Custom designs available for all types of SPDs
  • Metallized varistor blocks or epoxy coated varistors with rigid terminals available
  • Stacked varistors for improved surge current and energy capabilities

Technical Features:

  • Varistors for SPD Class I:
  •   High Iimp up to 12,5 kA (10/350 μs) – stacked varistors
  •   High Inom up to 30 kA (8/20 μs) – stacked varistors
  • Varistors for SPD Class II & III:
  •   High Imax up to 45 kA (8/20 μs) – single disc varistors
  •   High Inom up to 20 kA (8/20 μs) – single disc varistors

Lightning strikes and other high energy surges release very powerful flows of electricity which can damage whole buildings as well as indoor and outdoor objects if they are not protected againt these powerful overvoltages. These surges can be simulated either by 8/20 µs or 10/350 µs surge current pulses.

Why work with us
Reason 1

We offer our products in short and trustworthy delivery terms, at competing prices.

Reason 2

We are both responsible and accessible, offering you both technical and commercial support in the shortest possible time.

Reason 3

We are flexible and comprehensive, ready to assist you in any kind of unexpected situations.

Reason 4

We either understand  your needs or wish to understand them better by getting closer to you.

Reason 5

We are able to meet your expectations and capable of delivering the samples with all the required tests within a very short time. 

Reason 6

We steadily invest into new facilities and education and employ additional experts.

Reason 7

We do long term oriented  and flexible business and  we are financially stable and rely on teamwork.