AVX 1206 X7R Dielectric Capacitors AVX X7R Dielectric capacitors are called temperature stable" ceramics and fall into EIA Class II materials. The dielectric chip usage covers a broad range of industrial applications where known changes in capacitance due to applied voltages are acceptable. The AVX Standard Commercial-Grade MLCCs are available in case sizes 0402, 0805, and 0603. Voltage Range: 4 V to 500 V. Capacitance Range: 100 pF to 22 μF.