Capacitors are the main components of electronic circuits. It can store electrical energy, with charging; Discharge and AC; Dc isolation characteristics, there are many kinds of capacitors, safety capacitor, ceramic capacitor, ceramic capacitor, varistor and so on.
So, what is the breakdown voltage of the capacitor?
Simply put, breakdown voltage is the limit voltage of a capacitor, beyond which the dielectric inside the capacitor will be broken down. Capacitor with the increase of charging charge between two plates, plates are also increases, the voltage difference between the plate between the electric field intensity increases, when the voltage between the plate to a certain extent, will plate between the dielectric plate between the electric field ionization into conductive ion, so instantaneous powerful current is formed between the plates, the capacitance is punctured, the voltage is called the breakdown voltage.
Capacitor has the characteristics of "on AC, DC", DC polarity and voltage are fixed, can not pass through the capacitor. The polarity and voltage of alternating current are constantly changing. It can make the capacitor charge and discharge continuously, forming charge and discharge current.
In the contact capacitor, there is also a rated voltage, which is the voltage that the capacitor can withstand for a long time. It is lower than the breakdown voltage. Capacitors are safe and reliable when working at a voltage not higher than the rated voltage. Do not mistake that capacitors are normal only when working at the rated voltage.