Ceramic Capacitor Temperature Ratings

Engineers must check the data to know really know how a specific capacitor will perform under voltage.

Ceramic capacitor temperature ratings.

This tutorial explains how ceramic capacitor type designations such as x7r and y5v imply nothing about voltage coefficients. A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric. This letter represents the tolerance of the capacitor meaning how close the actual value of the capacitor can be expected to be to the indicated value of the capacitor. Nominal capacitance c the nominal value of the capacitance c of a capacitor is the most important of all capacitor.

Ceramic names temperature coefficients α α tolerances and letter codes for α. The capacitor as with any other electronic component comes defined by a series of characteristics. Ceramic disc capacitors have a capacitance value of 10pf to 100μf with a wide variety of voltage ratings between 16 volts to 15 kv and more. The second character indicates the maximum temperature.

The letter x as in x7r x5r corresponds to 55 c. All ratings are from 25 to 85 c. The third letter gives the maximum tolerance from that in ppm k. Ceramic disc capacitors are usually through hole components and are falling out of favor due to their size.

The first character indicates the lowest temperature that the capacitor can handle. 5 as in x5r corresponds to 85 c and 7 as in x7r corresponds to 125 c. Mlccs are used instead if capacitance values allow. Multi layer ceramic capacitor mlcc.

The theoretical range is from 45 c to 200 c.