KEMET Introduces ArcShield™ Technology
For High Voltage Commercial & Automotive
Applications
 
The
phenomenon of surface arcing is caused by a high voltage gradient
between the two termination surfaces or between one of the termination
surfaces and the counter internal electrode structure within the ceramic
body. It occurs most frequently at application voltages that meet or
exceed 500V, in high humidity environments, and in chip sizes with
minimal bandwidth separation (creepage distance). This phenomenon can
either damage surrounding components or lead to a breakdown of the
dielectric material, ultimately resulting in a short-circuit condition
(catastrophic failure mode).
ArcShield
Technology (Patent Pending) features KEMET's highly reliable base metal
dielectric system combined with a unique internal shield electrode
structure designed to suppress an arc-over event while increasing
available capacitance. Developed on the principle of a partial Faraday
cage, this internal system offers unrivaled performance and reliability
when compared to external surface coating technologies.
For added
reliability, KEMET's Flexible Termination technology is an available
option that provides superior flex performance over standard termination
systems. This technology was developed to address flex cracks, which are
the primary failure mode of MLCCs and typically the result of excessive
tensile and shear stresses produced during board flexure and thermal
cycling. Flexible Termination technology inhibits the transfer of board
stress to the rigid body of the MLCC, therefore mitigating flex cracks
which can result in low IR or short circuit failures.
KEMET’s ArcShield high voltage surface mount
MLCCs are manufactured in state of the art ISO/TS 16949:2002 certified
facilities and are also available in automotive grade, which undergo
stricter testing protocol and inspection criteria. Whether under-hood or
in-cabin, these devices are designed for mission and safety-critical
automotive circuits or applications requiring proven, reliable
performance in harsh environments. Automotive grade devices meet the
demanding Automotive Electronics Council's AEC-Q200 qualification
requirements.
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