MLP143M020EA1D

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Aluminum electrolytic capacitors (AECs) are a type of capacitor that use electrolytic aluminum foil as the anode and a paper soaked in synthetic resin as the dielectric. They are characterized by large capacitance, relatively low cost and long life, making them ideal for power supply filtering, noise suppression, frequency compensation and timing applications. The MLP143M020EA1D is one such AEC and looking at its application field and working principles will help us to better understand the type of capacitor it is.

The MLP143M020EA1D is a high voltage (450V), low impedance, radial-style AEC with a 4mm lead spacing. Its capacitance is very stable over time and across temperature much better than more common electrolytic capacitors, making it an ideal choice for applications such as power supply filtering, wave shapers, or as a frequency stabilizer. Additionally, it has a very low equivalent series resistance (ESR) which means it can easily handle transient current and voltage peaks and still provide clean stable waveforms.

The MLP143M020EA1D utilizes a construction method known as an End Bend Stacking method, where the components are stacked together in two flat layers, an anode and a cathode. The anode is constructed from several aluminum foil layers, with the cathode constructed from several smaller aluminum foil layers. The two layers are then connected by a central oxide film and two aluminum rivets. This process increases the device’s flexibility, allowing for bending and shaping it easier. Additionally, due to the increase in surface area offered by the stacked layers, the available capacitance is much greater than that of traditional chemistries.

The working principle of the MLP143M020EA1D is simple and easy to understand. When a voltage is applied to the device, the anode and cathode foil layers produce a chemical reaction. This reaction produces ions, which are stored in the oxide layer between the two foils. The amount of charge that is stored in the oxide film is proportional to the applied voltage and is the main source of the device’s capacitance. When the voltage is removed from the device, the ions return to either the anode or cathode, depending on the polarity, and the charge that was stored is released.

The MLP143M020EA1D is an example of an aluminum electrolytic capacitor and is used in many applications where large capacitance, low cost, and long life are desirable characteristics. Its End Bend Stacking method and working principle helps explain why this type of capacitor offers such great performance. These reasons, along with its low ESR, make it an ideal choice for power supply filtering, wave shaping and frequency stabilization applications.

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