Ceramic Capacitor Overheating

A ceramic is any of the various hard brittle heat resistant and corrosion resistant materials made by shaping and then firing a nonmetallic mineral such as clay at a high temperature.

Ceramic capacitor overheating.

Common examples are earthenware porcelain and brick. This heat along with the ripple current heating may lead to electrolyte evaporation and capacitor failure or thermal runaway. All other capacitors i ve touched were always cool even when used on a warm pcb. So i m getting 45 5 c on the cap of the capacitors.

Ceramic disc capacitors these are often used as safety capacitors in electromagnetic interference suppression applications. Following is the symbol for ceramic capacitor. This is first time i noticed something like that. A higher leakage current will cause a higher heat generation due to the power loss vi leakage where i leakage is the leakage current of the capacitor and v is the applied voltage.

Start capacitors work at voltage classifications that typically range from 370 to 440 v volts. The crystallinity of ceramic materials ranges from highly oriented to semi crystalline vitrified and often completely amorphous e g glasses. A sudden surge of voltage called overvoltage can cause a buildup of pressure in the sealed aluminum that makes up the outer casing of the capacitor which can lead to overheating damage to the capacitor s internal parts and possibly cause the capacitor to explode. The two most common types of ceramic capacitor are.

Unfortunately i couldn t find capacitors of the same size so the modem is now outside of its plastic case.