KEMET launches KO-CAP reliability assessment method for polymer electrolytic capacitors

December 02, 2015 // By Julien Happich
KEMET, KO-CAP Reliability Assessment method

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).

This new Reliability Assessment method complements the T540 and T541 COTS Series KO-CAPs. These high performance capacitors are designed for decoupling and filtering applications that require very low equivalent series resistance (ESR). 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, says KEMET. 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.

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