Ceramic Capacitor Power Rating

Smaller mlccs used in printed circuit boards are rated to voltages from only a few volts up to several hundreds of volts depending on the application.

Ceramic capacitor power rating.

Power ceramic capacitors can be supplied with high rated voltages in the range of 2 kv up to 100 kv. At high power applications the losses of these capacitors can generate a lot of heat. Dv dt ratings for multi layer ceramic capacitors. In recent years however as the maximum capacitance values of mlcc s has increased in any given case size many customers have looked to mlcc s as replacements for metalised film capacitors mfc s which have suffered from supply difficulties and shortages.

This note discusses the relationship of current handling power dissipation applied voltage and the maximum rated voltage of a multi layer ceramic capacitor. They can actually fit an x7r decoupling cap in this tiny form factor. Applicable to temperature characteristics u2j 7u c0g 5c beyond rated voltage of 200vdc since the self heating is low in the low loss series the allowable power becomes extremely high ompared to the common x7r r7 characteristics however when a load with self heating of 20 c is applied at the rated voltage the allowable power may be exceeded. Power ceramic capacitors can be made to withstand voltages in the range of 2kv up to 100 kv with a power specified at much higher than 200 volt amperes.

Historically the dv dt rating of multi layer ceramic capacitors mlcc s is not a parameter that has generally been requested by customers or provided by manufacturers. For this reason some special styles. The dimensions of these power ceramic capacitors can be very large.