How reliable are tantalum capacitors?

Modern tantalum capacitors are very reliable if used properly. That includes having a series resistance of at least 0.1 to 3 ohms in the circuit, derating the voltage to about 60% maximum of the rated voltage and keeping the temperature to a reasonable value. They must never, even briefly, be exposed to any reverse voltage.

Why is a tantalum capacitor more prone to breakdown than a polymer capacitor?

Solid Electrolytic Tantalum capacitors are more prone to failure and release larger amounts of heat at breakdown compared to Polymer Tantalum capacitors, due to resistant low manganese oxides in the fault sites in the dielectric. For the same amount of energy stored in the capacitor, this difference in heat release can lead to the failure mode in Solid Electrolytic Tantalum capacitors.

Why are solid electrolytic tantalum capacitors declining in general applications?

The decline in general applications of Solid Electrolytic Tantalum capacitors, including those where high reliability and environmental stability are most needed, is due to the loss in volumetric efficiency and the fear of ignition and burning tantalum failure mode. This issue now dominates online publications.

Who is the best capacitor manufacturer in the world?

With a market share of approximately 25%, Manufacturer A is one of the top players in the capacitor market. They have a strong presence in both developed and emerging markets, and their products are known for their high quality and reliability. Manufacturer B is another top capacitor manufacturer that has been in the industry for over 70 years.

Are surface mount solid electrolytic and polymer tantalum capacitors reliable?

The reliability of surface mount Solid Electrolytic and Polymer Tantalum capacitors was investigated using parts manufactured with conventional technology and F-Tech technology, which suppresses typical defects such as crystalline inclusions in the amorphous matrix of the tantalum oxide dielectric.

Does technology affect the reliability and failure mode of polymer tantalum capacitors?

Technology has a strong impact on the reliability and failure mode of polymer tantalum capacitors. The lowest failure rate and no wear-out failure mode were observed in Polymer Tantalum capacitors manufactured with F-Tech. In contrast, Solid Electrolytic Tantalum capacitors that failed short did not exhibit ignition or burning tantalum.