Summary of common capacitor failure principles (II)

Resistor failure mode and mechanism:

Failure mechanism: is the physical, chemical, thermodynamic, or other process that caused the failure.

1, the main failure mode and failure mechanism of the resistor

1) Open circuit: The main failure mechanism is the burning of the resistive film or the large-area shedding, the matrix fracture, the lead cap and the resistor body falling off.

2) The resistance drift is over-specified: the resistance film is defective or degraded, the substrate has movable sodium ions, and the protective coating is poor.

3) Lead fracture: defects in the welding process of resistors, contamination of solder joints, and mechanical stress damage of the leads.

4) Short circuit: migration of silver, corona discharge.