Capacitance in use process, if appear improper use or other external factors, are there will be a failure or damage.
Especially for ceramics capacitors, ceramics capacitor leakage reason analysis will let everybody to ceramics have good cognitive capacitor leakage of common factors.
What causes ceramics capacitor leakage?
Many factors to cause a decline in the insulation of the high-pressure ceramics capacitor leakage phenomenon.
Conclusion has the following two reasons: first is caused by dirt on the surface of the surface of the insulation, this kind of leakage current is not very big, is generally microamps level, hot air blow blow insulation value will rise.
Second internal crack, there are caused by welding cracks and ceramics capacitor manufacturing bad with crack.
This kind of crack caused by the leakage current will continue to rise, serious can cause local burst into flames.
Many of the company's technical staff can analyze whether for capacitance.
Because once the iron or heat up, will be back to normal, many engineers are often error analysis for the solder paste problem, many people first met no analysis is correct, the second to accurate analysis, the microscope, the samples is indeed a capacitance has a problem.
For ceramics capacitor leakage in terms of reliability, belongs to the typical low stress failure, multilayer ceramic capacitor
s, relays, polyester capacitor has these problems.
If you don't clean result in power supply, such as dc voltage is unusual, even if the rated voltage of the capacitor is 50 v, 25 v will leakage, but the capacitance between 1 ~ 10 v, the worst it work under the dc voltage abnormal situation after a certain period of time, will the leakage, and increase over time more and more, more and more serious.
High pressure ceramics capacitor leakage cause analysis here, if you want to avoid this problem, so might as well choose good quality ceramic capacitors, capacitance is thicker, the better, small leakage current, low dissipation, the capacity of the consistency is very accurate.
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