Varistor: Metal Oxide Varistor MOV » Electronics Notes
The metal oxide varistor, MOV, is the most widely used form of varistor. It is generally manufactured from a material such as zinc oxide, ZnO, although another material that is used is silicon carbide, SiC and this provides similar properties.
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20/2/2014· The injected silicon carbide particles are partially electrically conductive, and the resistance material is arranged in an electrically non-conductive cladding- or housing device (2). The varistor comprises two varistor connections (4), which are made of iron, tin, aluminum, nickel, copper, silver, gold, palladium or platinum.
Metal oxide varistor: Negative temperature coefficient …
Now also appears to the silicon carbide, selenium, tin, tantalum nitride, etc. as the representative of the non-oxide-based NTC thermistor material. NTC thermistor semiconductive porcelain mostly spinel structure or other structure of the oxide ceramics, having a negative temperature coefficient, the resistance value can be approximated as:
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This paper presents a direct-reading method for the nonlinearity index of silicon carbide varistor. Varistors of voltage rated from 50 V to 700 V can be measured without range switching. Measurement is made either at 0.1 and 1 mA or 1 and 10 mA of the varistor current. Precalibration is made by using an ordinary resistor. Measurement accuracy is -3 percent.
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Varistor current-voltage characteristics for zinc oxide (ZnO) and silicon carbide (SiC) devices High voltage varistor A 130 volt, 150 J MOV that has undergone astrophic failure, apparently as a result of a lightning strike, showing evidence of heat and smoke.
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Bulk electrical resistivity of technical silicon carbide in a …
Translated from Poroshkovaya Metallurgiya, No. 11(179), pp. 61–66, Noveer, 1977. The authors wish to thank V. Z. Romanova for helpful discussion and for the provision of silicon carbide single crystals. Cite this article Gnesin, G.G., Shipilova, L.A., Dyban'', Y.P. et al. Bulk electrical resistivity of technical silicon carbide in a SiC-Si composite.
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Varistor ceramics have been widely applied in surge protection for more than 40 years. A Brief Description of ZnO Varistor Technology Metal oxide varistors are novel ZnO-based ceramic semiconductor devices with highly nonlinear current-voltage …
Metal Oxide Varistor Degradation T - Leviton
of voltage and current is far superior to silicon carbide varistors. e characteristic feature of zinc oxide varis-tors is the exponential variation of current over a narrow range of applied voltage. Within the useful varistor volt-age range, the voltage-current relationship2