Common failure modes and failure mechanisms of capacitors

The main failure mechanisms causing capacitor breakdown

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

②Electrical aging and thermal aging of dielectrics;

③Electrochemical reaction inside the dielectric;

④Silver ion migration;

⑤The dielectric is mechanically damaged during the capacitor manufacturing process;

⑥ Changes in dielectric molecular structure;

⑦ Inter-electrode arcing in high humidity or low pressure environment;

⑧The dielectric is instantaneously short-circuited under mechanical stress.