Bare Disc Varistors

High Energy Suppressor Discs – These heavy-duty metal oxide varistors are designed for special applications where unique contacts are required. They offer excellent surge protection for use in industrial and consumer electrical equipment, power distribution control equipment, security/fire alarm systems, railroad equipment, switchboards, computers, telecommunication, power supplies and motor controls in transportation, oil drilling and mining equipment. The advantages of the High Energy Suppressor Discs are: good solderability (Ag), passivation with glass (on request), stacking possibility (Al electrodes).


Main features
Wide Operating Voltage Range VRMS 50 V to 2400 V
Many Model Sizes Available round, square,

rectangular shapes

High Energy Absorption Capability Wmax (2 ms) 120 J to 6000 J
High Peak Current Capability Imax (8/20 µs)

High Iimp Current Capability Iimp (10/350 µs)

25 kA to 100 kA

5 kA to 50 kA

Versions with Ag or Al electrodes


Technical data
Climatic Category 40/85/56 in accordance with IEC 68-1
LCT – 40°C
UCT +85°C
Damp Heat, Steady State (93% r.h., 40°C) 56 days in accordance with IEC 68-2-3
Operating Temperature -40 … +85°C in accordance with CECC 42 000
Storage temperature -40 … +125°C
Response Time < 25 ns