M39003/01-5301

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Tantalum capacitors are components which are used to store electrical charge in small forms and are commonly used in electronics applications. The M39003 is a series of capacitors manufactured from a proprietary tantalum powder and acquired by the military for use in tough environments. The M39003/01-5301 is a capacitor under this series that has specific characteristics, application fields, and a working principle related to its operating modes.

Characteristics

The M39003/01-5301 component dimensions are 3900 mils (or 3.9 inches) in length, 3900 mils in width and 500 mils in height. It is an organic wet-electrolytic radial leaded capacitor, designed for use under military specifications applied to various electronic equipment, including telecommunications, computing mechanisms, and medical diagnostics. This capacitor type is based on a tantalum dielectric, with wet-electrolyte electrolytes, and a solid-polymer anode. It has a voltage rating of 6V to 61V; an operating temperature range between -55°C and 130°C; a leakage current rating of 0.2 mA per V; a dissipation factor of 0.072 @ 10 KHz; and a temperature coefficient of capacitance between +22% and -56%.

Application Field

The M39003/01-5301 is primarily used as a bypass, decoupling, or filtering capacitor, where high-reliability, light weight, and stability against voltage are important considerations. It is resistant to high voltage transients and can operate at temperatures that exceed commercial operating limits. Thus, they are mainly used in Military, Industrial, Aerospace, Medical, and Automotive applications, where environmental conditions, such as vibrations, wide temperature ranges, high levels of humidity, extrusion, and irradiation can be found.

Working Principle

Tantalum capacitors work in a similar way as an electrolytic capacitor, but with a solid-polymer anode instead of the liquid electrolyte. When a voltage is applied, the positive anode dissolves and is stored within the anode, while negative electrons are stored in the cathode. This storage arrangement produces an internal capacitance that serves as the electrical charge storage mechanism. It also effectively isolates the anode from the cathode, which prevents current from flowing and allows the capacitor to act as an insulator.

This capacitance can be increased by increasing the distance between the electrodes or by using a material with higher dielectric properties. Therefore, by selecting the appropriate material for the anode, these capacitors can be designed to store a variety of electrical charges. In order to increase operational longevity, tantalum capacitors are also designed with a temperature coefficient that compensates for variations in voltage and frequency.

The M39003/01-5301 has a long-term temperature stability (+/-33% or +/-2C) that allows it to work over a wide temperature range and, is especially suited for use in applications where temperatures can vary suddenly and often. The combination of its reliable storage of electrical charge and its temperature coefficient make it an ideal choice for use in military and aerospace applications.

Conclusion

The M39003/01-5301 is a reliable and robust capacitor that is specifically designed for Military, Industrial, Aerospace, Medical, and Automotive applications. Its high reliability, light weight, and compatibility with high-level transients makes it an ideal choice for a range of tasks. The combination of a solid-polymer anode, an electrolytic electrolyte, and its temperature coefficient make it an extremely stable capacitor for use in varying environmental conditions. This stability, as well as its working principle, make this capacitor a popular choice for military and aerospace applications.

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