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Power dissipation of ZnO-based metal oxide varistors (MOVs) for electronic circuit protection

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3 Author(s)
Mahmud, S. ; Malaysia - KDU Coll., Univ. of Sci., Penang, Malaysia ; Abdullah, M.J. ; Amin, Z.M.

Power dissipation in the high-current (upturn) region of the current-voltage characteristic of ZnO-based metal oxide varistors (MOVs) has been observed to be influenced by the ZnO grain resistivity and nonlinearity. Power dissipation lower than 20 kW was observed in samples with lower grain resistivity values (less than 1 Ωcm) and higher coefficients of nonlinearity (α above 3.2). High concentration of intrinsic defects in ZnO powder could be the underlying cause of the higher grain resistivity, lower α and larger power dissipation.

Published in:

Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on  (Volume:3 )

Date of Conference:

18-21 Oct. 2004