M39003/01-2655/HSD

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Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor, which include solid and wet tantalum capacitors. A Tantalum capacitor utilizes tantalum metal as an anode, to form a two-terminal electrolytic component. It has the advantages of high capacitance per volume, low cost and high stability. Tantalum capacitors are usually used for signal and power supply interactions in electronic circuits such as deflection in TVs, operation in audio equipment, switching in computer equipment, and charging of DC capacitors.

M39003/01-2655/HSD Application Field and Working Principle

The M39003/01-2655/HSD is a type of medium-sized Leadless-Chip carrier (LCC) solid tantalum capacitor designed for military/aerospace applications. It has 65V voltage rating and a 1μF capacitance. It is encapsulated in an epoxy case with two band securing and marking locations. The appropriate appication of this part includes power supplies in radars, navigation systems, command & control systems and computer systems. The working principle of an M39003/01-2655/HSD solid tantalum capacitor is based on the principle of electrochemistry. It requires two electrodes, one of which is made of tantalum, and the other which is an electrically polarized electrolyte solution. When the capacitor is subjected to a potential difference across its electrodes, a measurable electrical field is produced in the structure. This causes electrolytic ions to pass via small openings between surfaces of the electrodes, known as “diffusion areas”.

The electrolyte occupies the space between an anode and a cathode. When a voltage is applied, electrical charge carriers known as holes are injected into the electrolyte material. This causes the electrolyte to become electron-enriched on the anode side and electron depleted on the cathode side. As the voltage is increased, the electric field causes more holes to move from the anode to the electrolyte, thereby forming a double layer capacitor. The capacitance of the M39003/01-2655/HSD solid tantalum capacitor depends on the surface area of the electrodes, as well as the specific dielectric properties of the electrolyte. The electrolyte also reduces the effects of temperature variations on the capacitance of the capacitor, making it more suitable for rugged applications in harsh environments.

Conclusion

Overall, the M39003/01-2655/HSD is a small-sized solid tantalum capacitor designed for demanding aerospace and military applications. Its small size makes it suitable for installation in tight spaces. Its capacitance and voltage rating are also quite appropriate for powering circuits in those applications. The working principle of the capacitor is based on electrochemistry, where the anode is made of tantalum and the other electrode is composed of a polarized electrolyte solution. This electrolyte material interacts with the electric field, allowing the capacitor to obtain its capacitance which is determined by the dielectric material properties and the electrode surface area.

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