Common failure modes and failure mechanisms of capacitors(2)

    Main failure mechanism of capacitor breakdown.

    1.The dielectric material has blemishes or defects, or contains conductive impurities or conductive particles;

    2. Electrical aging and thermal aging of dielectric;

    3. Electrochemical reaction in dielectric;

    4. Silver ion migration;

    5. Mechanical damage to dielectric during capacitor manufacture;

    6. The change of molecular structure of dielectric;

    7. Interpolar arc in high humidity or low pressure environment;

    8. Transient short circuit of dielectric under mechanical stress.