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CDR32BP1R0B3W4 Datasheet(PDF) 1 Page - Kemet Corporation |
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CDR32BP1R0B3W4 Datasheet(HTML) 1 Page - Kemet Corporation |
1 / 30 page ©KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300 CERAMIC CHIP CAPACITORS INTRODUCTION Ceramic chips consist of formulated ceramic dielectric materials which have been fabricated into thin layers, interspersed with metal electrodes alternately exposed on opposite edges of the laminated structure. The entire structure is then fired at high temperature to produce a monolithic block which provides high capaci- tance values in a small physical volume. After firing, con- ductive terminations are applied to opposite ends of the chip to make contact with the exposed electrodes. Standard end terminations use a nickel barrier layer and a tin overplate to provide excellent solderability for the customer. KEMET multilayer ceramic chip capacitors are produced in plants designed specifically for chip capa- citor manufacture. The process features a high degree of mechanization as well as precise controls over raw materials and process conditions. Manufacturing is supplemented by extensive Technology, Engineering and Quality Assurance programs. KEMET ceramic chip capacitors are offered in the five most popular temperature characteristics. These are designated by the Electronics Industies Association (EIA) as the ultra-stable C0G (also known as NP0, military version BP), the stable X7R (military BX or BR), the stable X5R, and the general purpose Z5U and Y5V. A wide range of sizes are available. KEMET multi- layer ceramic chip capacitors are available in KEMET's tape and reel packaging, compatible with automatic placement equipment. Bulk cassette packaging is also available (0805,0603 and 0402 only) for those pick and place machines requiring its use. ELECTRICAL CHARACTERISTICS 1. Working Voltage: Refers to the maximum continuous DC working voltage permissible across the entire operating temperature range. The reliability of multilayer ceramic capacitors is not extremely sensitive to voltage, and brief applications of voltage above rated will not result in immediate failure. However, reliability will be degraded by sustained exposure to voltages above rated. 2. Temperature Characteristics: Within the EIA classifications, various tempera- ture characteristics are identified by a three-symbol code; for example: C0G, X7R, X5R, Z5U and Y5V. For Class I temperature compensating dielectrics (includes C0G), the first symbol desig- nates the significant figures of the temperature coefficient in PPM per degree Celsius, the second designates the multiplier to be applied, and the third designates the tolerance in PPM per degrees Celsius. EIA temperature characteristic codes for Class I dielectrics are shown in Table 1. For Class II and III dielectrics (including X7R, X5R, Z5U & Y5V), the first symbol indicates the lower limit of the operating temperature range, the second indicates the upper limit of the operating temperature range, and the third indicates the maximum capacitance change allowed over the operating temperature range. EIA type designa- tion codes for Class II and III dielectrics are shown in Table 2. 3. Capacitance Tolerance: See tables on pages 73-76. 4. Capacitance: Within specified tolerance when measured per Table 3. The standard unit of capacitance is the farad. For practical capacitors, capacitance is usually expressed in microfarads (10 -6 farad), nanofarads (10 -9 farad), or picofarads (10 -12 farad). Standard measurement conditions are listed in Table 3 - Specified Electrical Limits. Like all other practical capacitors, multilayer ceramic capacitors also have resistance and inductance. A simplified schematic for the single frequency equivalent circuit is shown in Figure 1. At high frequency more complex models apply - see KEMET SPICE models at www.kemet.com for details. Table 1 – EIA Temperature Characteristic Codes for Class I Dielectrics Significant Figure of Temperature Coefficient Multiplier Applied to Temperature Coefficient Tolerance of Temperature Coefficient PPM per Degree C Letter Symbol Multi- plier Number Symbol Letter Symbol PPM per Degree C 0.0 0.3 0.9 1.0 1.5 C B A M P -1 -10 -100 -1000 -10000 0 1 2 3 4 ± 30 ± 60 ± 120 ± 250 ± 500 G H J K L Table 2 – EIA Temperature Characteristic Codes for Class II & III Dielectrics Low Temperature Rating High Temperature Rating Maximum Capacitance Shift Degree Celsius Letter Symbol Degree Celsius Number Symbol Letter Symbol Percent +10C -30C -55C Z Y X +45C +65C +85C +105C +125C +150C +200C 2 4 5 6 7 8 9 ± 1.0% ± 1.5% ± 2.2% ± 3.3% ± 4.7% ± 7.5% ± 10.0% ± 15.0% ± 22.0% + 22/-33% +22/-56% +22/-82% A B C D E F P R S T U V EIA Class II II II II II II II II III III III III KEMET supplies the C0G characteristic. KEMET supplies the X7R, X5R, Z5U and Y5V characteristics. 67 |
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