Film capacitor withstand voltage and impact resistance

Film capacitors with good pressure and impact resistance are very competitive, and an important indicator for measuring the overvoltage resistance of capacitors is self-healing. When the operating voltage is higher than the rated value, the short circuit may occur due to the breakdown of the film medium at a certain position. But the arc will cause the metallization layer of the breakdown point to melt and vaporize. During this time, the length of the discharge zone continues to expand and become larger.

After the end of the discharge, a part of the vaporized medium will be agglomerated due to the sudden drop in the temperature of the discharge area. At this time, an insulating layer will appear quietly around the discharge electrode, separating the breakdown area. Let the two poles of the capacitor work properly without being affected by its insulation.

Therefore, the reliability of the work is on a step, which is the role of the film capacitor, so that the anti-surge voltage capability of the film capacitor reaches 1.5 times the rated voltage that is difficult for ordinary capacitors. At the same time, due to the use of metallized split film technology in the plastic film medium of film capacitors, the possibility of short-circuit breakdown does not occur in theory, which makes the film capacitors strengthen their withstand voltage, and the guarantee will theoretically Take it to the next level.