For this device, the size/dimension of the program is 0.177Lx0.079W 4.50mmx2.00mm.As a general rule, temperature coefficient of resistance is simply the change in electrical resistance of a substance per degree change in temperature, and its value is X7R 2R1.
1808J1000823JXT Features
a size/dimension of 0.177Lx0.079W 4.50mmx2.00mm with X7R 2R1 being the highest temperature coefficient
1808J1000823JXT Applications
There are a lot of Knowles Syfer 1808J1000823JXT applications of ceramic capacitors.