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C642 Datasheet(PDF) 6 Page - Kemet Corporation |
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C642 Datasheet(HTML) 6 Page - Kemet Corporation |
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6 / 66 page  6 dielectric cathode aluminum foil paper soaked in electrolyte electrolyte solution anode aluminum foil Extended cathode Anode foil Cathode foil Tissues Foil tabs Aluminum electrolytic capacitor typical construction Aluminum Electrolytic Capacitors Aluminum electrolytics offer some of the smallest sizes for a given capacitance and voltage. Commonly used for filtering and bulk energy storage, electrolytics are available in rated voltages exceeding 500 VDC. KEMET Electrolytic capacitors are utilized in a wide variety of demanding power electronics applications such as automotive, power generators and converters, welders, wind turbines, uninterruptible power supplies, and medical imaging. Electrolytic capacitors consist of aluminum foil which is first etched to increase its surface area. Separate, carefully designed etching techniques are used for the anode and cathode foils. A layer of aluminum oxide, an excellent dielectric, is formed on the surface of the etched anode foil before the foils are wound together between special separator papers. At the same time, tabs are welded to the foils to form the connections. The wound assembly is impregnated with a liquid electrolyte. This electrolyte is a precision- made compound which fully impregnates the etched foil, providing a low ESR conductive path to the cathode foil with stable electrical and chemical properties. KEMET crafts its own electrolytes to match the etched foil characteristics and desired final properties. The assembly is packaged in such a way as to provide excellent vibration resistance and low thermal resistance. KEMET offers a broad line of axial, snap-in, screw terminal and miniature electrolytic capacitors; however, it is often beneficial to optimize the capacitor to a specific requirement, particularly in automotive and power applications. KEMET’s systems and production methods are designed with optimization in mind. By utilizing a “library” of foils, electrolytes, separator papers, and mechanical parts in carefully selected combinations, KEMET can swiftly design and build optimized electrolytic capacitors to match a given specification. |
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