We believe that some people think that "even if cracks caused by board deflection could be prevented, ceramic capacitors will fail by short circuit mode if a dielectric breakdown occurs by an abnormal voltage or other factor. Considering that a short circuit of a capacitor leads to the emission of smoke or ignition, I am still concerned about using ceramic capacitors in power lines."
In order to solve this problem, it is effective to connect two capacitors in series.
There will be rare cases where a dielectric breakdown occurs in a capacitor by abnormal voltage or other factors. However, the risk of short circuit mode failures can be reduced by connecting two capacitors in series in a DC circuit. If the insulation of one of the capacitors deteriorates, most of the voltage will be shared by the other capacitor with a higher insulation resistance; therefore, the advancement of the deterioration can be suppressed and a short circuit can be prevented.
Utilizing this method, ceramic capacitors are used in locations where there is severe emphasis on safety, such as between the battery terminals of a car traveling system.