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- W2184535941 abstract "Multilayer ceramic capacitors (MLCCs) exposed to high voltages, around 1000VDC in air, are prone to both surface-arcover and internal breakdown. In either event failures will result at the instance of surface-arc-over as the circuit is destabilized which may cause damage to surrounding components even if the capacitor remains temporarily functional. The performance of HVArc Guard TM X7R capacitors, that prohibit arc-over occurrence, is compared to conventional MLCC designs using a dielectric withstanding tester, surface acoustic microscopy and high speed photography. The high speed camera fixture developed allows the failure occurrence on applying DC voltage to be closely examined. By coupling this with post examination of voltage failures in cross-sections, the root cause of failures is determined on a case-by-case basis. Cross-section analysis of failures without the benefit of direct observation of the failure event cannot always determine the root cause because of extensive damage and destruction to the components. At higher ramp rates of 3000VDC/second the mechanism of failure for HVArc Guard TM capacitors is internal breakdown not surface-arc-over that is observed in conventional MLCCs. In addition to the above voltage breakdown tests a series of AC Voltage and surge voltage tests on HVArc Guard TM X7R and C0G (NP0) capacitors are described. These differences in performance are reviewed and the relevance to applications discussed." @default.
- W2184535941 created "2016-06-24" @default.
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- W2184535941 date "2007-01-01" @default.
- W2184535941 modified "2023-09-26" @default.
- W2184535941 title "Voltage Breakdown Mechanisms in High Voltage Rated, Surface Mount MLCCs" @default.
- W2184535941 hasPublicationYear "2007" @default.
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