Tantalum Capacitor Application Notes, What should we pay attention to when selecting tantalum capacitors?

1) The reliability of tantalum capacitors will be affected by the ambient temperature, such as temperature, humidity, mechanical stress, etc., and provide sufficient margin for the capacitors during use;
2) Try to keep the ripple current and ripple voltage as small as possible;
3) Tantalum capacitors are polar, and reverse voltage cannot be applied during use. If reverse voltage is unavoidable, the application time must be very short and not exceed the following values:

At 25℃, 10% of rated voltage or 1V, choose the smaller one;
At 85°C, 5% of the rated voltage or 0.5V, choose the smaller one;
At 125°C, 1% of the rated voltage or 0.1V, choose the smaller one;

To ensure high reliability of tantalum capacitors, it is recommended that the voltage meet the following conditions:
For general applications, the operating voltage is less than 70% of the rated voltage, and in low-impedance circuits or power circuits, less than 30% of the rated voltage;
When used in circuits with a temperature higher than 85°C (not higher than 125°C), derating is required

When used in a circuit with inrush current passing, it is necessary to add protective components to the capacitor, such as series resistance;

When used in circuits prone to short circuits, more leeway should be provided to maintain high reliability of the capacitors.