M39003/03-0186H

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Tantalum capacitors are one of the most widely used electronic components in modern electronics. The M39003/03-0186H capacitor is a type of tantalum capacitor designed for use in high-temperature and high-reliability applications. It is commonly used in military, aerospace, automotive, and other demanding or high-reliability applications.

Application Field

The M39003/03-0186H is designed for use in extreme environmental conditions. It has a wide operating temperature range of -55℃ to 125℃ and can handle a wide range of voltages up to 50V. The device is also designed for high-reliability applications due to its construction, which involves a tantalum anode and a manganese dioxide cathode. The cap has a high capacitance of 470μF, making it a good choice for power-supply decoupling or filtering, noise suppression, and timing applications. Additionally, the device has an extremely low dissipation factor, making it suitable for high-frequency applications.

Working Principle

Tantalum capacitors work in a similar way to other capacitors, with the main difference being the materials used in their construction. A tantalum capacitor is formed by the electrochemical deposition of both an anode and cathode on opposite surfaces of a tantalum-oxide dielectric material. The anode is typically made of an electrolytic material such as tantalum and the cathode is typically a manganese dioxide material. The anode and cathode are then connected to the two opposite electrical contacts completing the capacitor.

When the capacitor is connected in a circuit, a voltage is applied across the electrodes, creating a field of electrochemical charge within the tantalum-oxide dielectric. This electrochemical charge creates an electrical capacitance allowing current to flow through the capacitor in the same way that current would flow through an open-circuit resistor. The amount of current that flows is proportional to the voltage applied across the capacitor.

Advantages and Disadvantages

One of the main advantages of the M39003/03-0186H tantalum capacitor is its wide operating temperature range, allowing it to be used in applications with extreme environmental conditions. In addition, the device has a high capacitance of 470μF, making it suitable for use in power-supply decoupling and filtering, noise suppression, and timing applications. The capacitor is also designed for high-reliability applications due to its construction, which involves a tantalum anode and a manganese dioxide cathode.

One disadvantage of the device is its limited voltage rating, which is only 50V. Additionally, due to the electrochemical nature of the capacitor’s construction, it has a significantly lower temperature coefficient than other types of capacitors. Finally, the capacitor has a relatively low volumetric efficiency compared to, for example, electrolytic capacitors.

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