M39003/03-0176

Tantalum Capacitors

Tantalum capacitors, also known as tantalum electrolytic capacitors, are a type of electrolytic capacitor that uses a tantalum oxide layer as the anode. Tantalum capacitors are small and lightweight, allow for low-resistance current flow, and are highly reliable in terms of their ability to store and dissipate electrical energy.

The M39003/03-0176 is a post mounting surface mounted tantalum capacitor typically used in high-density systems. It is designed for applications requiring high capacitance values in a compact form factor, such as in high-frequency switching applications.

Application Field

M39003/03-0176 tantalum capacitors are commonly used in RF (Radio Frequency) circuits, providing filtering, decoupling, and by-pass applications. They find extensive use in commercial, industrial, and military applications. This part is particularly suitable for high frequency circuits and the high-reliability requirements of military and other aerospace applications.

Working Principle

Tantalum capacitors operate using the same principles as any other type of electrolytic capacitor. From a chemical perspective, when a voltage is applied across the electrodes, a chemical reaction occurs in the electrolyte solution, forming an oxide layer on one of the pads. This oxide layer acts as an electrical insulator, thus allowing electrons to accumulate on one of the pads, creating a charge. This charge is stored until the voltage is removed, and the electrical current is blocked.

The M39003/03-0176 tantalum capacitor is based on a layer of tantalum pentoxide (Ta2O5), an extremely thin (20-30 nm) insulating oxide layer. The tantalum pentoxide layer acts as the dielectric, or insulating material, between the anode and the cathode. The anode consists of a sintered powder of tantalum and aluminum, while the cathode is formed of an electrolytic solution. A sintered plate of tantalum oxide forms the cathode, providing the porosity to allow electrons to move freely.

M39003/03-0176 tantalum capacitors are voltage-sensitive, meaning that they can discharge quickly when exposed to a voltage spike. They are also temperature-sensitive, and their performance may be affected by excessive heat, moisture, and shock. These types of capacitors are not suitable for certain applications, including automotive and medical applications.

Conclusion

M39003/03-0176 capacitors are a type of tantalum capacitor used in high-frequency applications. These capacitors offer high capacitance values in a compact form factor, and are highly reliable in terms of their ability to store and dissipate electrical energy. However, they must be used in the appropriate application, as their performance may be affected by temperature, moisture, and shock. Overall, they provide excellent performance for high frequency switching applications, and are found in a wide variety of commercial, industrial, and military applications.