Chip capacitors are automotive qualified

May 08, 2015 // By Graham Prophet
To meet increasing demands from the automotive market, Knowles capacitor brand Syfer Technology has expanded its offering of AEC-Q200 qualified devices. Multilayer Ceramic Capacitors (MLCC’s) and EMI filter products have extended ranges.

An important characteristic in automotive applications today is package size. Starting with the miniature 0603 size, and going up to a 3640 footprint, MLCC’s in C0G and X7R dielectrics are now offered in capacitances ranging from 100 pF to 4.7 µF, with operating voltages from 50V to 3 kVdc.

The -55°C to +150°C high temperature dielectric, X8R range, has been extended from a working voltage of 50 Vdc up to 3 kVdc which is one of the highest ratings available. Capacitance values have also been extended from 270 pF up to 1.0 µF (in a 2225 case size up to 3 kVdc voltage rating). Maximum capacitance change is ±15% (without applied voltage) and available tolerances listed as ±5%, 10% and 20%. Package sizes are unaltered at 0805 to 2225.

MLCC Surge and Safety types, in both C0G and X7R dielectrics, can now be supplied within the spectrum 4.7 pF to 22 nF and case sizes 1808 to 2220. These AEC-Q200 qualified parts are certified to X1, X2 and Y2/X1 ratings depending on type.

For critical EMI protection applications the company offers both X2Y (balanced line) and feedthrough filters that are AEC-Q200 qualified. The E03 and X2Y products can now be specified with capacitance values of 330 pF to 560 nF over the rated voltages of 50V and 100V. For on-board EMI protection the E01 and E07 ranges of feedthrough C filters are 3-terminal chip devices designed to offer reduced inductance compared with conventional MLCCs when used in signal line filtering. These products are now fully qualified to AEC-Q200 in C0G and X7R dielectrics with chip sizes 0805, 1206 and 1806; capacitance range from 120 pF to 68 nF and voltage ratings up to 100V. A current rating of 300 mA is standard for all E01 variants and 1 to 3A for all E07 variants.

To withstand the harsh environment of automotive applications the FlexiCap termination is available for all of