M39003/09-2019

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Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor, which use tantalum as the anode electrode to store electric charge. They are frequently used in electronics and electrical applications, due to their low cost, high capacitance and small size. The M39003/09-2019 is a specific type of tantalum capacitor that is widely used in the commercial market.

Application Field of the M39003/09-2019

The M39003/09-2019 is part of a broader range of standard military spec alternating tantalum capacitors. It is used in a wide variety of military and aerospace applications due to its low cost, reliable performance, and long life cycle. These include computers, medical equipment, communication systems, navigation devices, aircraft, radios, satellites, and ground support equipment.

The M39003/09-2019 can also be found in commercial applications such as automotive, medical, telecommunication, consumer electronics and power supplies. Consumer applications include MP3 players, medical equipment, toys, and cell phones. The superior pulse handling ability and the wide temperature range make it suitable for automotive applications such as engine management systems, climate control systems, and ABS systems.

Working Principle of the M39003/09-2019

Tantalum capacitors feature an anode comprised of the metal tantalum, which is usually in the form of a pellet or foil. This is then coated with a dielectric layer, which can either be an oxide such as manganese dioxide or a polymer. The anode is then wrapped in a non-conductive cover, with the anode and dielectric layer separated by a plastic or paper layer.

When a voltage is applied to the capacitor, electrons are drawn to the cathode, while ions flow through the electrolyte solution to the anode. When the voltage is removed, the ions are attracted back to the cathode, forming an electric double layer. This process creates a charge stored within the capacitor and is known as electrolytic capacitance. The M39003/09-2019, utilising tantalum as its anode, typically has a capacitance of up to 225 μF and can operate at temperatures between –55°C and 125°C.

Advantages of the M39003/09-2019

The M39003/09-2019 offers several advantages over other types of capacitors, such as higher maximum ratings, lower total cost, and more reliable performance. It has a very low temperature coefficient rating, meaning that its capacitance changes very little with temperature. Due to its low ESR and ESL values, the M39003/09-2019 is particularly suitable for applications where low-frequency power is required.

Tantalum capacitors are also renowned for their long shelf life and reliability. They can last up to 10 years, which is much longer than many other capacitor types. While the M39003/09-2019 cannot be used with low-voltage events, such as voltage spikes, its shock and vibration resistance and superior pulse handling capabilities make it very resilient to harsh environments.

Conclusion

The M39003/09-2019 is an excellent choice of tantalum capacitor for a wide range of commercial and military applications. This capacitor type offers superior pulse handling abilities, low total cost, high capacitance, and a long operational life. The low ESR and ESL values also make it particularly suitable for low-frequency power applications. With its long operational lifespan, resilience to harsh conditions, and low temperature coefficient rating, the M39003/09-2019 is well suited for use in demanding applications.

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