What are the electrolytic capacitors in SMT pnp processing

SMT processing plants are also very particular about the selection and use of electronic components. Among them, tantalum electrolytic capacitors have a larger unit volume capacity, so surface-mounted components with a capacity exceeding 0.33μF usually need to use this tantalum electrolytic capacitor. capacitor. The electrolyte response speed of tantalum electrolytic capacitors is much faster than that of ordinary capacitors, so tantalum electrolytic capacitors must be used in places that require high-speed computing processing. Tantalum electrolytic capacitors are usually suitable for application in consumer electronic devices due to their unique advantages in price.Next, author from qihe smt pick and place machine will take you to understand the reliable characteristics of tantalum electrolytic capacitors
a. Since tantalum electrolytic capacitors are sintered into porous positive electrodes with very fine particles in the SMT processing plant, the volumetric capacitance is particularly large, and the dielectric constant of the tantalum oxide film is larger than that of the aluminum oxide film, so Under the same working voltage and capacitance, the volume of tantalum electrolytic capacitors is much smaller than that of aluminum electrolytic capacitors.
b, the use of a wide temperature range. Generally, tantalum electrolytic capacitors can work in the temperature environment of -40℃~85℃, and some can even work normally at 155℃.
c, the leakage current is very small, the loss is relatively low, the insulation resistance is large, and the frequency characteristics are good.
d, the capacitance is large, the service life is long, and it can be made into ultra-small components, which is very convenient.
e. Due to the stable chemical properties of the tantalum oxide film and the acid and alkali resistance, the electrolytic capacitors have stable performance and can still maintain very good electrical properties after long-term operation.
f. Since the tantalum electrolytic capacitors in the SMT processing plant use tantalum metal materials and some reasons for the process, the cost is relatively high, and the natural price will be more expensive.
g. Tantalum electrolytic capacitors are polar capacitors with low working voltage.
Tantalum electrolytic capacitors in SMT processing plants are mainly used in occasions where the performance parameters of aluminum electrolytic capacitors are difficult to meet high requirements, such as military and civilian complete circuits that require capacitors to be small in size, large in capacity range, good in frequency and impedance characteristics, and high in product stability. . The electronic components that these products may use are more demanding. Therefore, we should also discuss with electronic engineers whether it is suitable for use when selecting components.

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