M39003/01-8265H

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Tantalum capacitors are special types of capacitors with some unique properties. The M39003/01-8265H device is a valve-regulated, tantalum electrolytic capacitor commonly used in various applications. This article discusses the application field and working principle of the M39003/01-8265H.

Applications

The M39003/01-8265H device is most commonly used in communications and military/aerospace applications, especially for use in high-power, high-reliability products. The device is particularly suitable for situations where a high capacitance is needed in a tight space. It can also be used in switching power supplies, as it has a low Equivalent Series Resistance (ESR) resulting in less power dissipation and a more efficient operation. In addition, the device is well-suited for applications which require safety-critical electrostatic discharge (ESD) protection.

Construction

The M39003/01-8265H device consists of two stacked layers of tantalum powder, separated by an insulation layer and sealed to an epoxy base plate. The positive and negative plates are formed by the layers of tantalum powder. The cathode plate is formed as a serpentine pattern, and the anode plate is formed in a meander shape for increased surface area. The device is constructed using a process called Solid Electrolytic Technology (SET), which uses a combination of anode additives, cathode additives, and electrolyte additives to create unique capacitor characteristics.

Working Principle

The M39003/01-8265H device works by storing electric charge within the insulated tantalum powder layers. When a potential difference is applied across its terminals, a current can be drawn from the device to deliver the charge stored in the capacitor. The device operates in a way similar to other capacitors, however it utilizes a special combination of electrolyte, anode additives, and cathode additives to create its own unique characteristics.

The capacitor’s characteristics, such as its capacitance, are a function of the anode and cathode surface area as well as the type of electrolyte used in the device. The electrolyte functions as a bridge between the anode and cathode, allowing a flow of electrons from one side to the other. The amount of charge stored by the device is determined by the surface area of the plates and the concentration of electrolyte used. The device is rated to operate up to 3.3V, and can handle up to 1000mA of current.

Conclusion

The M39003/01-8265H device is a high-efficiency, low-carbon, solid electrolytic tantalum capacitor used commonly in high-power, safety-critical applications. Its compact size is ideally suited for use in applications where a high capacitance is needed in a small space. The device works by storing charge in its two insulated tantalum powder layers, and its characteristics such as capacitance are determined by surface area and the concentration of electrolyte.

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