Ceramic capacitor is necessary to have a temperature that is greater than -55°C for stable operation.A substance's temperature coefficient of resistance is generally defined as how its electrical resistance changes with per degree change in temperature.A voltage of 100V can be used for operation.
C0805C391K1GAC7800 Features
with 30ppm/Cel ppm/°C being the highest temperature coefficient with the voltage - Rated DC of 100V
C0805C391K1GAC7800 Applications
There are a lot of KEMET C0805C391K1GAC7800 applications of ceramic capacitors.