AVX has introduced X7R multilayer ceramic capacitors that offer a voltage range of 4V to 500V and a capacitance range of 100pF to 22µF. The X7R devices are called “temperature stable” ceramics and fall into EIA Class II materials. The temperature variation of capacitance is within ±15% from -55°C to +125°C. This capacitance change is non-linear.
These ceramic capacitors can be used in a broad spectrum of industrial applications where known changes in capacitance due to applied voltages are acceptable.