Metal oxide varistors and method thereof

Details Metal oxide varistors and method thereof Metal oxide varistors and method thereof

H - Electricity

01

C

H01C 7/10 (2006.01) H01C 7/108 (2006.01) H01C 7/112 (2006.01)

Patent

CA 2070825

ABSTRACT OF THE DISCLOSURE A varistor comprises a primary varistor metal oxide, aluminum in an amount of about 1 to about 30 parts per million (ppm), about 0.1 to about 0.5 mole % bismuth, about 0.1 to about 1.5 mole % antimony, about 0.1 to about 1 mole % chromium, about 0.1 to about 1.0 mole % manganese, about 0.1 to about 2.0 mole % cobalt, and about 0 to about 1.0 mole % boron. Each of these elements is present in the form of its oxide and the varistor has a DC leakage current at 80% of V1ma/cm2 of less than 1.0 x 10-7 amp/cm2 .

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