Ceramic Capacitor Temperature Coefficient

The first character indicates the lowest temperature that the capacitor can handle.

Ceramic capacitor temperature coefficient.

5 as in x5r corresponds to 85 c and 7 as in x7r corresponds to 125 c. Class 3 ceramic capacitors offer higher volumetric efficiency than the class 2 ceramic capacitors but their temperature stability is not nearly so good. 30 ppm c 25 c reference within the temperature range of 55 c to 125 c. Engineers must check the data to know really know how a specific capacitor will perform under voltage.

The theoretical range is from 45 c to 200 c. That is to say these are c0g characteristics products with a small temperature variance width. The second character indicates the maximum temperature. The letter x as in x7r x5r corresponds to 55 c.

A typical performance for the change of capacitance with temperature is 22 to 56 over a range of 10 c to 55 c. C0g np0 ceramics offer one of the most stable capacitor dielectrics available. Modern c0g np0 formulations contain neodymium samarium and other rare earth oxides. Temperature compensating type multilayer ceramic capacitors have a small temperature coefficient of electrostatic capacitance max.

This tutorial explains how ceramic capacitor type designations such as x7r and y5v imply nothing about voltage coefficients. Only available as leaded components. The reality of modern small form factor ceramic capacitors is a good reminder to always read the data sheet. Ceramic capacitor temperature coefficient tc coding class i temperature compensation type ceramic tc tc tolerance ppm c ppm c symbol for tc 25c to 85c see 4 10 25c to 55c calculated np0 c0 30ppm 30 72 n33 s1 30ppm 30 79 n75 u1 30ppm 30 89 n150 p2 30ppm 30 105.

Temperature coefficient tc the temperature coefficient of a capacitor is the maximum change in its capacitance over a specified temperature range. C0g np0 is the most popular formulation of the temperature compensating eia class i ceramic materials.