Syfer has introduced X7R dielectric MLCCs (multilayer chip capacitors) with a defined capacitance variation under applied DC voltage across the full operating temperature range. These capacitors deliver high capacitance, as they have a dielectric constant in the region of 2000-4000, says the company. The TCC/VCC MLCCs are available in two versions. The "B" code dielectric conforms to MIL STD BX dielectric and IECQ-CECC 2X1 standards, while the "R" code dielectric conforms to MIL STD BZ dielectric and IECQ-CECC 2C1 standards. The 2X1 (BX) capacitors are voltage stable at +15 to -25% capacitance charge with full rated DC voltage applied across the temperature range. The 2C1(BZ) offer +20 to -30% capacitance charge. The 2X1 (BX) range includes capacitors rated at 50, 100 and 200V, and with capacitance ranges from 100pF to 4.7nF (50V, 0603), through 2.7 to 180nF (50V, 1808) up to 15nF to 1µF (50V, 2225). These dielectric MLCCs are suitable for use in coupling and power supply bypassing applications, while the higher voltage types are suitable for switching power supplies, DC/DC converters, automotive and aerospace equipment. The capacitors are available with FlexiCap terminations using the company's proprietary termination material. The capacitors are RoHS-compliant.
