Product Information

C317C102K2R5TATR

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Datasheet
Multilayer Ceramic Capacitors MLCC - Leaded
Manufacturer: Kemet



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243 - Global Stock


Ships to you between Mon. 05 Dec to Fri. 09 Dec

MOQ : 1
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Manufacturer
Kemet
Product Category
Multilayer Ceramic Capacitors MLCC - Leaded
Series
C300
Brand
Kemet
Tradename
Goldmax
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MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED Multilayer ceramic capacitors are available in a edges of the laminated structure. The entire structure is variety of physical sizes and configurations, including fired at high temperature to produce a monolithic leaded devices and surface mounted chips. Leaded block which provides high capacitance values in a styles include molded and conformally coated parts small physical volume. After firing, conductive with axial and radial leads. However, the basic terminations are applied to opposite ends of the chip to capacitor element is similar for all styles. It is called a make contact with the exposed electrodes. chip and consists of formulated dielectric materials Termination materials and methods vary depending on which have been cast into thin layers, interspersed the intended use. with metal electrodes alternately exposed on opposite 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 appli- which are greater than 15%. Class III capacitors cations where high Q and stability of capacitance char- have 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 - 55C to + 125C (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 char- range of - 55C to + 125C. 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 tem- or less. They are made from materials which are perature range of + 10C to + 85C. 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 TemperatureCharacteristics Parameter C0G X7R Z5U Dissipation Factor: Measured at following conditions. C0G 1 kHz and 1 vrms if capacitance >1000pF 2.5% 1 MHz and 1 vrms if capacitance 1000 pF 0.10% 4.0% (3.5% 25V) X7R 1 kHz and 1 vrms* or if extended cap range 0.5 vrms Z5U 1 kHz and 0.5 vrms Dielectric Stength: 2.5 times rated DC voltage. Pass Subsequent IR Test Insulation Resistance (IR): At rated DC voltage, 1,000 M F 1,000 M F 1,000 M F whichever of the two is smaller or 100 G or 100 G or 10 G Temperature Characteristics: Range, C -55 to +125 -55 to +125 + 10 to +85 Capacitance Change without 0 30 ppm/C 15% +22%,-56% DC voltage * MHz and 1 vrms if capacitance 100 pF on military product. Table I 4 KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300APPLICATION NOTES FOR MULTILAYER CERAMIC CAPACITORS The variation of a capacitors impedance with frequency ELECTRICAL CHARACTERISTICS determines its effectiveness in many applications. The fundamental electrical properties of multilayer ceramic capacitors are as follows: Dissipation Factor: Dissipation Factor (DF) is a mea- sure of the losses in a capacitor under AC application. It is the Polarity: Multilayer ceramic capacitors are not polar, ratio of the equivalent series resistance to the capacitive reac- and may be used with DC voltage applied in either direction. tance, and is usually expressed in percent. It is usually mea- Rated Voltage: This term refers to the maximum con- sured simultaneously with capacitance, and under the same tinuous DC working voltage permissible across the entire conditions. The vector diagram in Figure 2 illustrates the rela- operating temperature range. Multilayer ceramic capacitors tionship between DF, ESR, and impedance. The reciprocal of are not extremely sensitive to voltage, and brief applications the dissipation factor is called the Q, or quality factor. For of voltage above rated will not result in immediate failure. convenience, the Q factor is often used for very low values However, reliability will be reduced by exposure to sustained of dissipation factor. DF is sometimes called the loss tangent voltages above rated. or tangent d, as derived from this diagram. Capacitance: The standard unit of capacitance is the farad. For practical capacitors, it is usually expressed in ESR Figure 2 -6 -9 microfarads (10 farad), nanofarads (10 farad), or picofarads -12 (10 farad). Standard measurement conditions are as O ESR follows: DF = X c Class I (up to 1,000 pF): 1MHz and 1.2 VRMS maximum. X c Class I (over 1,000 pF): 1kHz and 1.2 VRMS maximum. 1 X = Class II: 1 kHz and 1.0 0.2 VRMS. c 2fC Class III: 1 kHz and 0.5 0.1 VRMS. Like all other practical capacitors, multilayer ceramic capacitors also have resistance and inductance. A simplified schematic for the equivalent circuit is shown in Figure 1. Other significant electrical characteristics resulting from Insulation Resistance: Insulation Resistance (IR) is the these additional properties are as follows: DC resistance measured across the terminals of a capacitor, represented by the parallel resistance (Rp) shown in Figure 1. For a given dielectric type, electrode area increases with R capacitance, resulting in a decrease in the insulation resis- Figure 1 P tance. Consequently, insulation resistance is usually specified as the RC (IR x C) product, in terms of ohm-farads or megohm-microfarads. The insulation resistance for a specific capacitance value is determined by dividing this product by R L S the capacitance. However, as the nominal capacitance values become small, the insulation resistance calculated from the C RC product reaches values which are impractical. C = Capacitance R = Equivalent Series Resistance (ESR) Consequently, IR specifications usually include both a mini- S mum RC product and a maximum limit on the IR calculated L = Inductance R = Insulation Resistance (IR) P from that value. For example, a typical IR specification might read 1,000 megohm-microfarads or 100 gigohms, whichever is less. Impedance: Since the parallel resistance (Rp) is nor- Insulation Resistance is the measure of a capacitor to mally very high, the total impedance of the capacitor is: resist the flow of DC leakage current. It is sometimes referred to as leakage resistance. The DC leakage current may be calculated by dividing the applied voltage by the insulation 22 Z = R + (X - X ) resistance (Ohms Law). S C L Dielectric Withstanding Voltage: Dielectric withstand- Where Z = Total Impedance ing voltage (DWV) is the peak voltage which a capacitor is designed to withstand for short periods of time without dam- RS = Equivalent Series Resistance age. All KEMET multilayer ceramic capacitors will withstand a test voltage of 2.5 x the rated voltage for 60 seconds. 1 X = Capacitive Reactance = C 2fC KEMET specification limits for these characteristics at standard measurement conditions are shown in Table 1 on X = Inductive Reactance = 2fL L page 4. Variations in these properties caused by changing conditions of temperature, voltage, frequency, and time are covered in the following sections. KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300 5 Application Notes

Tariff Desc

8532.24.00 43 no --Ceramic dielectric, multilayer Free

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