UPT2P391MRD

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Aluminum electrolytic capacitors are widely used in various electronic applications, and their application fields encompass virtually every aspect of circuit and device design. The UPT2P391MRD is one of the latest models from the Uptronix range of aluminum electrolytic capacitors. In this article, we will discuss the application fields and working principles of the UPT2P391MRD.

The UPT2P391MRD is a RoHS compliant surface-mount aluminum electrolytic capacitor. It’s capable of providing up to 85°C stable performance with a long service life, and is an ideal choice for filtering, sampling, and decoupling applications. This capacitor is suitable for use in various small-to-medium-level electronics applications, such as power supplies, audio/video equipment, industrial controls, automotive and other electrical/electronic products. It’s also suitable for power board design, moderate output power cord design, and filtering for V-H bridge circuits.

The UPT2P391MRD features polarization resistance and ripple current capability, withstanding voltage of ±50Vdc, and capacitance values ranging from 2.2-1000uF. With a 3.2 x 4.2mm compact footprint, the UPT2P391MRD offers high reliability and long-term stability. It also has a low ESR rating of 0.0006Ω and only uses 1.6mR of current per µF of capacitance.

The working principle of the UPT2P391MRD is based on Faraday’s law of electrolysis, wherein electric energy is converted into chemical energy. This capacitor uses an electrolytic solution to react with the anode current, resulting in the electrolytic reaction that changes the source of electric energy into chemical stored energy in the capacitor. The electric bi-polarity of the di-electrolyte is created through the diffusion of carriers in the electrolyte in response to the electric field.

The electrolyte of the UPT2P391MRD is composed of a low-resistivity cathode and a high-resistance anode, which houses the oxidation species during the reaction. During the capacitor’s operation, the anode electrons are attracted by the cathode and the anode potential is continuously reduced until a stable equilibrium is achieved. This phenomenon is known as the "space charge". The space charge determines the capacitance of the capacitor as it directly affects its capacitance value.

As the anode loses electrons, the anode voltage is increased, resulting in an increase in capacitance. This increase can be used to reduce excessive ripple currents, allowing the capacitor to operate longer with better stability and improved reliability. This unique design feature of the UPT2P391MRD ensures the highest life expectancy, making it an ideal choice for high temperature, high impedance and multiple applications in a wide variety of electronics components.

In conclusion, the UPT2P391MRD is a RoHS-compliant aluminum electrolytic capacitor that offers high performance and reliability in various small-to-medium-level electronics applications. Its unique working principle and design ensure the highest life expectancy and make it the ideal choice for filtering, sampling, and decoupling applications. As such, it is one of the most reliable and reliable aluminum electrolytic capacitors available on the market today.

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