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PHS capacitors boast highest voltage, lowest leakage current

09 Sep 2014

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KEMET Corp. has released two series of Polymer Hermetic Seal (PHS) capacitors—the T550 & DLA series and T551 series—boasting the highest voltage and deliverable energy with the lowest leakage current of any other solid tantalum capacitor.

PHS capacitors have robust anode quality and benign failure mode, features that make them suitable for use in high-voltage power management applications including buck boost converters, filtering, hold-up capacitors and other high ripple current applications.

PHS capacitors

Typical applications include high voltage power management such as buck/boost converters, filtering and hold-up capacitors. Source: KEMET

The capacitors claim to provide the highest total capacitance and the most economical solution for high power applications, with reduced ESR and enhanced capacitance retention at higher frequencies and low temperatures—all within an approximately 25 per cent lighter package than the equivalent wet tantalum capacitor.

The T551 series offers all of the performance benefits of the T550 but with an increased temperature rating of 125°C. The T550 PHS Series is rated at 105°C.

Together with DLA, NASA, Aerospace Corporation and several KEMET aerospace customers, KEMET also developed a comprehensive drawing that includes rigorous testing options for high standard flight applications including space. The initial release of the DLA Drawing 13030 qualifies a subset of the T550 series part numbers to ensure these products are suitable for high reliability applications.

KEMET Technical Fellow Dr. Yuri Freeman discusses the latest advancements in polymer tantalum technology and the new T550 Series Polymer Hermetic Seal capacitors. Source: KEMET

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