The Electronics Components, Assemblies & Materials Association (EIA) characterizes X5R dielectric as a Class II material.
Components of this classification are a fixed ceramic dielectric, generally made of Barium Titanate (BaTiO3). Typically they are used for bypass and decoupling applications.
X5R exhibits a predictable change in capacitance with respect to time and voltage. As the ambient temperature changes, there is a minimal change in capacitance.
Capacitance change is limited to ±15% from -55°C to +85°C.. For more information about EIA Classifications, see this FAQ on Temperature Coefficients.
This datasheet has more information about KEMET’s X5R Ceramic Capacitors.
Tuesday, October 6th, 2015