KO-CAP or Polymer capacitors provide lower ESR than other bulk electrolytic capacitors. The early polymer devices were rated for 16V and less. Higher voltage capacitors with ratings up to 35V, 50V, and 63V are now available with reliability on par with their lower-voltage siblings.
At CARTS in 2004, time-to-failure data demonstrated the good reliability of 6V polymer capacitors with, then considered, aggressive designs. Models for voltage and temperature acceleration allow customers to estimate lifetime at application conditions.
The paper presents the technology that allows higher voltage operation, time-to-failure data collected over wider temperature and voltage ranges, trends in the acceleration, and a comparison to the lifetime of 6V capacitors.