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C340C225K5R5TA

製品説明
仕様・特性

MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED Multilayer ceramic capacitors are available in a variety of physical sizes and configurations, including leaded devices and surface mounted chips. Leaded styles include molded and conformally coated parts with axial and radial leads. However, the basic capacitor element is similar for all styles. It is called a chip and consists of formulated dielectric materials which have been cast into thin layers, interspersed with metal electrodes alternately exposed on opposite edges of the laminated structure. The entire structure is fired at high temperature to produce a monolithic block which provides high capacitance values in a small physical volume. After firing, conductive terminations are applied to opposite ends of the chip to make contact with the exposed electrodes. Termination materials and methods vary depending on the intended use. TEMPERATURE CHARACTERISTICS Ceramic dielectric materials can be formulated with Class III: General purpose capacitors, suitable a wide range of characteristics. The EIA standard for for by-pass coupling or other applications in which ceramic dielectric capacitors (RS-198) divides ceramic dielectric losses, high insulation resistance and dielectrics into the following classes: stability of capacitance characteristics are of little or no importance. Class III capacitors are similar to Class Class I: Temperature compensating capacitors, II capacitors except for temperature characteristics, suitable for resonant circuit application or other appliwhich are greater than ± 15%. Class III capacitors cations where high Q and stability of capacitance charhave the highest volumetric efficiency and poorest acteristics are required. Class I capacitors have stability of any type. predictable temperature coefficients and are not affected by voltage, frequency or time. They are made KEMET leaded ceramic capacitors are offered in from materials which are not ferro-electric, yielding the three most popular temperature characteristics: superior stability but low volumetric efficiency. Class I C0G: Class I, with a temperature coefficient of 0 ± capacitors are the most stable type available, but have 30 ppm per degree C over an operating the lowest volumetric efficiency. temperature range of - 55°C to + 125°C (Also known as “NP0”). Class II: Stable capacitors, suitable for bypass X7R: Class II, with a maximum capacitance or coupling applications or frequency discriminating change of ± 15% over an operating temperature circuits where Q and stability of capacitance charrange of - 55°C to + 125°C. acteristics are not of major importance. Class II Z5U: Class III, with a maximum capacitance capacitors have temperature characteristics of ± 15% change of + 22% - 56% over an operating temor less. They are made from materials which are perature range of + 10°C to + 85°C. ferro-electric, yielding higher volumetric efficiency but less stability. Class II capacitors are affected by Specified electrical limits for these three temperature temperature, voltage, frequency and time. characteristics are shown in Table 1. SPECIFIED ELECTRICAL LIMITS Temperature Characteristics Parameter C0G Z5U 0.10% Dissipation Factor: Measured at following conditions. C0G – 1 kHz and 1 vrms if capacitance >1000pF 1 MHz and 1 vrms if capacitance 1000 pF X7R – 1 kHz and 1 vrms* or if extended cap range 0.5 vrms Z5U – 1 kHz and 0.5 vrms X7R 2.5% (3.5% @ 25V) 4.0% Dielectric Stength: 2.5 times rated DC voltage. Pass Subsequent IR Test Insulation Resistance (IR): At rated DC voltage, whichever of the two is smaller 1,000 M F or 100 G 1,000 M F or 100 G Temperature Characteristics: Range, °C Capacitance Change without DC voltage -55 to +125 0 ± 30 ppm/°C -55 to +125 ± 15% * MHz and 1 vrms if capacitance 1,000 M or 10 G 100 pF on military product. Table I 4 © KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300 F + 10 to +85 +22%,-56%

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