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Tantalum Capacitors

Tantalum capacitors are widely used in today\'s electronics because of their high capacitance-to-volume ratio and long shelf life. The M39003/09-0123H is a surface-mount, dry, hermetically sealed capacitor with a low outcome resistance, making it suitable for a variety of applications.

Application Field

The M39003/09-0123H capacitor is primarily used in military and aerospace applications, including the aerospace guidance and control system. It is also often used in high-voltage power supplies and in applications that require noise suppression or decoupling of power supply. This capacitor is often parallel-connected to another capacitor in multi-stage power supply circuits, and is also used in deflection, regulation, and switching circuits.

Worki ng Principle

Tantalum capacitors work on the same basic principle of all capacitors, namely that they store charge on two metal plates (called electrodes) separated by an insulator (called the dielectric). The M39003/09-0123H capacitor utilizes a tantalum pentoxide (Ta2O5) as the dielectric material which has a high dielectric constant, allowing for a large capacitance in a small package size. The two electrodes, which are immersed in an electrolyte, each consist of a tantalum rod and the anode is coated with tantalum pentoxide. When a voltage is applied, electrical current is forced to flow through the electrolyte and a reverse electric current is sent to the rod to “charge” the capacitor. The charged rods store energy in the form of a voltage potential, which is the result of the amount of charge accumulated on each plate.

The reverse current sent to the rods helps keep the charge on the capacitors steady over a longer period than traditional capacitors. This is due to the increased surface area of the anode, resulting in lower leakage currents than in other capacitor types. Additionally, the hermetically sealed construction of the M39003/09-0123H makes it suitable for rugged environments, and its low internal resistance ensures high frequency performance.

The M39003/09-0123H provides a compact and reliable solution for many military and aerospace applications. Its robust construction and long shelf life provide an advantage over traditional capacitors when used in highly demanding environment.

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