M550B128K040AA

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Tantalum-polymer capacitors, specifically the M550B128K040AA series, are constructed with a tantalum core and a polymer coating. They are typically used in devices and systems that require low leakage and long-term reliability, such as memory cards and motherboards. The M550B128K040AA series provides high energy density, high capacitance for small footprints, and low ESR (equivalent series resistance) for increased switching speeds and power savings.

The physical construction of the M550B128K040AA involves a tantalum electrode core (anode or cathode, depending on desired function) produced through powder metallurgy, nickel plating, and active components such as manganese dioxide, copper oxide, and a polymer film (copolymerized ethylene and tetrafluoroethylene). The capacitor is then hermetically sealed using a glass-to-metal seal.

The working principle of the M550B128K040AA relies on the internal rectifying abilities of the tantalum dust and the polymer film in conjunction with the applied voltage. As the voltage is increased, the anode material on the tantalum electrode reacts with the electrolyte and the surrounding substrate materials by which an electrical double layer (EDL) is created. This EDL, has the effect of approximately doubling the capacitance of the capacitor, allowing for higher energy densities.

The applications of the M550B128K040AA tantalum-polymer capacitor include all electronic applications requiring a reliable, efficient, long-term, low-cost, and low-leakage capacitor. Telecommunications, medical equipment, space and aerospace, automotive, LED lighting and general-purpose electronics, are all ideal environments for the implementation of these capacitors. High-power, short-term applications such as motor-starting capacitors, electromechanical switches, and spot-welders are not suitable.

Tantalum-polymer capacitors, such as the M550B128K040AA series, provide high capacitance, low leakage and high energy density with excellent long-term reliability. The hermetically sealed construction provides the added benefit of excellent moisture and temperature resistance. With applications that include telecommunications, medical equipment, LED lighting, and aerospace, the M550B128K040AA series offers a reliable and efficient solution for many electronic needs.

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