M39003/09-3073/TR

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Tantalum Capacitors

Tantalum capacitors are widely used in circuits where small size and low leakage current are important. The M39003/09-3073/TR capacitor is one such tantalum capacitor, specifically used in aerospace applications. This article will cover the application field and working principle of the M39003/09-3073/TR tantalum capacitor.

Applications

The M39003/09-3073/TR is a tantalum capacitor suitable for circuit designs that require rated voltage up to 16V and capacitance values of 1 μF or less. Common applications include AC line filtering, decoupling, and storing energy in dynamic memory chips. This capacitor is also frequently used for filtering in high power applications such as in power supplies for computers, displays, and generally any equipment that relies on a regulated power supply. Due to its low leakage current, this capacitor is also commonly used in aerospace applications, such as on board avionic systems, high-altitude warplanes, missiles, and other military operations.

Working Principle

The M39003/09-3073/TR capacitor is based on an anode layer of tantalum deposited on a ceramic substrate over a cathode layer of manganese dioxide. The capacitance of a tantalum capacitor is mainly determined by the area, thickness, and permittivity of its anode layer. The permittivity of the ceramic substrate also affects the capacitance. Due to its small size, the M39003/09-3073/TR has a small capacitance and is well suited for high-frequency applications.

During operation, when the voltage applied to the capacitor is within its rated voltage range, the tantalum anode forms an insulating film between itself and the manganese dioxide cathode. This isolates the two layers and prevents the current from flowing between them, forming a capacitor. The capacitance of the capacitor is determined by the size of the insulating layer. When the applied voltage exceeds the rated voltage, the insulation breaks down, preventing the capacitor from forming a dielectric layer. This leads to the capacitor becoming short-circuited, and the capacitance of the capacitor drops significantly.

Types

The M39003/09-3073/TR is a single layer non-polarized capacitor. Non-polarized capacitors can be used in circuits without any orientation requirements, as there is no positive or negative capacitor terminal. Polarized capacitors must be oriented in the correct direction during installation, or the capacitor may short circuit or not function properly.

Conclusion

The M39003/09-3073/TR is a high quality tantalum capacitor suitable for use in circuits requiring tight size requirements and low leakage current, and is commonly used in aerospace, high power, and high frequency applications. Its working principle is based on forming an insulating layer between two layers of opposed conducting material, and its capacitance is determined by the size of that insulating layer. The M39003/09-3073/TR is a single-layer capacitor, which eliminates the need for orientation during installation.

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