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In high temperature environments, the leakage current of tantalum capacitors shows significant changes. Here are its main features:
Leakage current changes with temperature
Increase in leakage current: As the temperature increases, the leakage current of tantalum capacitors will increase significantly. This phenomenon is called the leakage current temperature curve. Typically at 85°C, the leakage current may be 14 times that of room temperature (25°C).
Manufacturer differences: Tantalum capacitors of the same specifications produced by different manufacturers may have significant differences in leakage current changes at high temperatures. This is due to factors such as manufacturing processes, raw materials, and equipment accuracy.
Impact on reliability: Products with large changes in leakage current at high temperatures may cause breakdown due to the accumulation of heat generated by themselves, while products with small changes show better stability and reliability at high temperatures. Therefore, the leakage current change rate directly affects the reliability of tantalum capacitors.
Summarize
Overall, the leakage current of tantalum capacitors increases significantly in high-temperature environments, which requires their reliability and stability to be considered during selection and application. Choosing products with low leakage current slew rates can improve safety and performance in high-temperature applications.