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Benchmarks of the different types of electrolytic capacitors Anode material Electrolyte Capacitance range (μF) Max. rated voltage at 85 °C (V) Upper categorie temperature (°C) Specific ripple current (mA/mm 3) 1) Aluminum (roughened foil) non solid, e.g. Ethylene glycol, DMF, DMA, GBL: 0.1–2,700,000: 600: 150: 0.05–2.0 solid, Manganese ...
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Some types of capacitors, primarily tantalum and aluminum electrolytic capacitors, as well as some film capacitors have a specified rating value for maximum ripple current. Tantalum electrolytic capacitors with solid manganese dioxide electrolyte are limited by ripple current and generally have the highest ESR ratings in the capacitor family.
A capacitor is a passive device on a circuit board that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. This is a list of known capacitor manufacturers, their headquarters country of origin, and year founded. The oldest capacitor companies were founded ...
Electrolytic capacitors differ from other capacitor types, whose capacitances are typically measured at 1 kHz or higher. For tantalum capacitors a DC bias voltage of 1.1 to 1.5 V for types with a rated voltage of ≤2.5 V or 2.1 to 2.5 V for types with a rated voltage of >2.5 V may be applied during the measurement to avoid reverse voltage.
For example, for low voltage types a 10 V electrolytic capacitor has a dielectric thickness of only about 0.014 μm, a 100 V electrolytic capacitor of only about 0.14 μm. Thus, the dielectric strength also influences the size of the capacitor.
The predominant application of all electrolytic capacitors is in power supplies.They are used in input and output smoothing capacitors, as decoupling capacitors to circulate the harmonic current in a short loop, as bypass capacitors to shunt AC noise to the ground by bypassing the power supply lines, as backup capacitors to mitigate the drop in line voltage during sudden power demand or as ...
Electrolytic capacitors are usually used due to high capacity at low cost and low size. Smaller non-electrolytics may be paralleled with these to compensate for electrolytics' poor performance at high frequencies. Computers use large numbers of filter capacitors, making size an important factor. Solid tantalum and wet tantalum capacitors offer ...