Chip capacitor material NPO and COG

NPO is a high-frequency material for chip ceramic capacitors, with a working temperature of - 55+125 degrees Celsius and high temperature resistance. The capacitance temperature characteristic is+/- 30 PPM, and the capacity does not change with temperature. This material has much better crack resistance than the X7R. COG material is a representation of TDK high-frequency capacitance, which is also used by Samsung. It is equivalent to NPO high-frequency material