The company Iskra Zascite was founded in 1989 in order to develop and produce surge protection devices for various applications of protecting electrical and electronic appliances in industry, business facilities and people&＃39;s homes. Despite a number of different technologies which have been appearing on the market in the field of surge protection devices, Iskra Zascite has remained loyal to varistor technology and thus contributed its part to the development of this particular technology. The company also provided guidelines for the development of varistors which represent the main basic components of modern surge protection devices. Despite constant changes which have been appearing in the field of surge protection devices regarding technology as well as different approaches towards protecting electrical and electronic appliances against devastating consequences of lightning and other industrial or switch boosting voltage, the company has nevertheless managed to keep its position among the leading companies in this field due mainly to its constant development and innovative approaches. The development of the company has been greatly influenced by the development in electronics since parallel to introduction of new technologies in the field of electronics also new demands regarding construction and technological characteristics of surge protection devices appeared. By keeping in touch with the novelties in electronics as well as constantly searching for more efficient ways of protection the company has managed to hold its position in the field to the present day.