A New Capacitor Technology is Introduced by Kemet

Published:2012/1/9 21:14:00 Author:Li xiao na From:SeekIC

With Diamond Superabrasives, Kemet International Limited is in the leading place of precision and polishing technology. It is built in the year of 1938. This firm is able to provide innovative solutions to operations which need precision finish and close tolerance.

Recently, a new capacitor technology is introduced by this firm, which can be used in high voltage application susceptible to surface arcing. This capacitor technology can be called ArcShield. The internal shield electrode system of this technology can suppress arc-over when increasing available capacitance. ArcShield High Voltage capacitors are designed for applications, such as automotive, that meet or exceed 500V with exposure to high humidity environments. Conditions such as these promote surface arcing in MLCCs.

The surface arc-over discharge can be stopped by ArcShield devices, therefore, the capacitor and surrounding components on a printed circuit board will not be damaged. A high voltage gradient between the MLCC’s termination surfaces or between one termination surface and the component’s internal electrode structure will create surface arcing. This surface arcing either damage surrounding components or lead to a breakdown of the MLCC’s dielectric material, consequently, a short-circuit condition can be created.

Power supply, LCD fluorescent backlight ballasts, HID lighting, telecom equipment, industrial and medical equipment/control, LAN/WAN interface, analogue and digital modems, and automotive are the target market s of ArcShield. Furthermore, switch mode power supplies, high voltage coupling and DC blocking, lighting ballasts, voltage multiplier circuits, DC/DC converters and coupling capacitors in Cuk converters are the typical applications of ArcShield.

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