Common failure modes and failure mechanisms of capacitors(3)

Main failure Mechanism of causing Open Circuit Capacitor

(1) The "self-healing" occurs in the lead position, which insulates the electrode from the lead wire;

(2) The contact surface of the outlet line and the electrode are oxidized, resulting in low level open circuit;

(3) Poor contact between the lead line and the electrode;

(4) Corrosion fracture of anodic elicited foil of electrolytic capacitor;

(5) Drying up or freezing of liquid electrolytes;

(6) Instantaneous open circuit of dielectric under mechanical stress.