Polymer Aluminum Electrolytic Capacitors Failure Mode

Main failure modes

ECAS series are carried out enough debug and screening in process.
Possibility of failure is low, and electrical characteristic is stable.

  • Accidental Failure : Short mode

    If more than allowable load (thermal stress / electric stress / mechanical stress) applied, rarely cause the breakdown of the dielectric layer and reach short circuit.

  • Wear-out Failure : Open mode

    Conductive polymer become depleted out, then Cap value decreased under high temperature. Finally it will become open mode. It is life expectancy of ECAS series. The cap drop speed is very slow as you can see in below data.

Failure Mode in Market

Failure Mode in Market is Open mode mainly.