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Tantalum Capacitors

M39003/03-4043/HSD application field and working principle

Tantalum capacitors are essential components for many high-end electronic products in the electronics industry, and play an important role in electronic products. M39003/03-4043/HSD is a professional tantalum capacitor. This article discusses its application field and working principle.

1. Application field

M39003/03-4043/HSD is a multi-anode, four-terminal tantalum electrolytic capacitor. It is widely used in automotive electronics and military applications due to its high temperature performance, high reliability, and low inductance and ESL. Some thermally and mechanically demanding high-power applications also use this type of tantalum capacitors.

This type of capacitor has a rated temperature of -55 to + 125 °C. It is designed for applications requiring extended load life and voltage tolerance, as well as voltage derating capability. It contains a dry tantalum anode and is available in capacitance values from 1µF to 350µF.

2. Working principle

Tantalum capacitor is a polarized capacitor, and its working principle is basically the same as other polarized capacitors. It consists of two parts, an anode and a cathode, and a dielectric of tantalum pentoxide in between. The anode is a thin layer of sintered tantalum, lead in between which is a thin oxide dielectric layer of tantalum pentoxide. It acts like two metal plates separated by an insulating material.

When a potential difference is applied across the electrodes, charges of opposite types are deposited on the capacitor\'s opposite plates. When the potential difference is removed, most of these charges remain close to the plates and the capacitor stores energy. In this way, current flows through the capacitor when a voltage is applied across the capacitor. This current is known as capacitive charging current.

When the capacitors are used in high power applications, they tend to have high ESR values, which reduce the capacitance in the circuit and reduce the performance efficiency. Additionally, M39003/03-4043/HSD also has a long service life due to its high-quality anode material, which ensures its stability and reliability.

Conclusion

M39003/03-4043/HSD is a high-temperature and high-reliability four-wire tantalum capacitor with low inductance and ESL. This type of capacitor has a wide range of applications including automotive electronics, military applications, and high-power applications. Its working principle is the same as other polarized capacitors, with charges stored on opposite plates when a potential difference is applied. It is able to provide high performance efficiency due to its low ESR value and long service life.

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