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Surface-mountable capacitors prevent surface arc-over

Posted: 18 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ceramic multilayer capacitors? surface mount MLCCs? prevent surface arc-over?

Vishay's X7R ceramic multilayer capacitors

Vishay Intertechnology Inc. has released what it claims as the industry's first surface-mount X7R multilayer ceramic chip capacitors (MLCCs) designed to prevent surface arc-over. The new devices provide maximum capacitance in high-voltage ratings and an increased capacitor voltage breakdown.

The VJ1206, VJ1210, VJ1808 and VJ1812 HVArc Guard MLCCs feature a unique, patent-pending internal design structure that prevents surface arc-over at high voltages. This design allows for higher capacitances than standard high-voltage MLCCs. It also facilitates the use of smaller case sizes in high-voltage products, allowing for device miniaturization and reduced component cost.

Optimized for applications including buck and boost DC/DC converters, voltage multipliers for flyback converters, and lighting ballast circuits, the new devices will be used in lighting systems and power supplies for medical, computer, motor control, construction and mining, and telecommunications applications.

The four HVArc Guard capacitors feature capacitances ranging from 100pF to 0.27?F, and offer twice the standard voltage breakdown with voltage ratings from 250 VDC to 1000 VDC. The devices eliminate the need for conformal coating and can replace wire leaded through-hole capacitors.

Samples and production quantities of the VJ HVArc Guard surface-mount X7R MLCCs are currently available, with lead times of approximately 8 weeks.

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