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MLCCs boast 1-2.5kV voltage range

Posted: 20 Dec 2011 ?? ?Print Version ?Bookmark and Share

Keywords:MLCC? surface-mount? dielectric?

Vishay Intertechnology Inc. has improved the minimum capacitance values for its VJ HVArc Guard surface-mount X7R multilayer ceramic chip capacitors (MLCCs). The company offers a C0G (NP0) dielectric option with a voltage range of 1-2.5kV in five case sizes from 0805 to 2225 for lower capacitance values.

The minimum capacitance values for VJ HVArc Guard X7R MLCCs have increased to 470pF in the 0805 case size and to 220pF in the 1206, 1210, 1808 and 1812 case sizes. If lower capacitance is required, 1kV X7R devices in the 0805, 1206 and 1210 case sizes can be replaced by C0G MLCCs that offer 10pF minimum capacitance.

VJ HVArc Guard X7R

Vishay's MLCC offers a C0G (NP0) dielectric option with a 1-2.5kV range.

According to the company, the VJ HVArc Guard devices feature a unique, worldwide patented internal design structure that prevents surface arc-over at high voltages. This design allows for higher capacitance than standard high-voltage MLCCs, and it facilitates the use of smaller case sizes in high-voltage products. This allows for device miniaturization and component cost reduction.

The MLCCs are available with optional polymer terminations that provide increased resistance to board flex cracking. With these terminations, the devices reduce capacitor failures related to mechanical cracking and lower warranty costs by confining failures to the capacitor, thus reducing the number of damaged components on the circuit board or damage to the complete device itself.

Manufactured in noble metal electrode (NME) technology with a wet build process, VJ HVArc Guard MLCCs are optimized for high-voltage applications including buck and boost DC/DC converters and voltage multipliers for flyback converters in power supplies for cable modems and routers. The devices are compliant to RoHS Directive 2002/95/EC and halogen-free according to IEC 61249-2-21.

Samples and production quantities of the VJ HVArc Guard MLCCs are available with lead times of 10-14 weeks for large orders.

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