KO-CAP Reliability Assessment Method for Polymer Electrolytic Capacitors

KEMET’s new KO-CAP® Reliability Assessment method is the first of its kind for polymer electrolytic capacitors.

The T540 and T541 Commercial-Off-the-Shelf (COTS) Series are the only polymer electrolytic capacitors available today with failure rate options defined by this innovative testing criteria. Developed as a result of over ten years of research, the Reliability Assessment method utilizes accelerated voltage and temperature conditions applied to board-mounted samples to assess long-term device reliability. The failure rates available are B (0.1% per 1,000 hours), C (0.01% per 1,000 hours) and D (0.001% per 1,000 hours).

KO-CAPs with the new Reliability Assessment method are available with rated voltages from 2.5 to 63 VDC, capacitances up to 1,500 µF, and ESR as low as 5 mΩ – all in surface mount packaging.

Design engineers can now match the reliability requirements of their project to the appropriate failure rate. Traditional Weibull methods of assessing reliability are not suitable for polymer electrolytic capacitors and fall short of properly assessing lot-to-lot reliability. Prior to this release, this capability was only available through source control drawings, but is now easy to design in by adding the desired failure rate to the 13th character of the part number.

For information about ESR and capacitance performance across rated temperature and voltage, models are available in KEMET’s K-SIM at ksim.kemet.com.

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