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Kemet Corporation has announced the release of a 35V-rated surface mount polymer tantalum chip capacitor.

Polymer tantalum capacitors have become a popular choice for portable consumer electronics due to their low ESR (equivalent series resistance), high reliability, volumetric efficiency, low-profile design and benign failure mode.

To date, these devices have been most commonly used in applications at or below 14V and are limited to voltage applications that cannot exceed 20V of continuous duty.

These voltage restrictions are driven by limitations in the materials of construction and manufacturing processes that have until today prevented the industry from achieving higher voltage ratings.

‘By overcoming voltage limitations through advances in materials and manufacturing processes, Kemet has constructed and qualified polymer tantalum capacitors suitable for applications of up to 25V of continuous duty,’ said Dr Philip Lessner, Kemet’s chief technical officer and chief scientist.

‘In addition, these devices have demonstrated surge voltage handling capabilities in excess of 46V.’ This increase in voltage rating now provides designers working with higher voltage applications, such as 20V to 24V power input rails, with the option of incorporating polymer tantalum technology into new designs.

Designated the T521 Series, Kemet’s initial offering includes the low-profile V case size (7.3mm x 4.3mm x 1.9mm) with a capacitance rating of 15uF and maximum ESR ratings of 125mohms.

Future releases will include higher case heights (7.3mm x 4.3mm x 3.0mm) with target capacitance values of 22uF and 33uF, as well as smaller footprints (3.5mm x 2.8mm x 2.0mm) targeting application voltages of 6.8uF and less.

Sample quantities are available upon request through local Kemet representatives.

Mass production quantities are available in increments of 1,000 pieces.

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