EMVH630ADA330MJA0G

Aluminum electrolytic capacitors are a type of capacitor whose anode is made of a pure aluminum foil with a surface oxide layer whose thickness acts as a dielectric. To increase the capacitance in a unit volume, the foil is etched with a corrugated shape the so-called “end-plates”. Then, a liquid or solid electrolyte (containing ions) impregnates the oxide layer. The other electrode, the cathode, a conductive liquid or solid and a lead wire is attached to the pure aluminum anode through a metallized 3rd electrode on top of the electrolyte.These devices come in several packages, such as axial-lead, snap-in and others, as can be seen in the picture below.EMVH630ADA330MJA0G is a surface mount aluminum electrolytic capacitor from Panasonic, featuring Low ESR (Equivalent Series Resistance). Its code stands for the following features:

• EM : M Logic surface mount package
• VH: Type of case (Polymer);
• 630 : 630 volts rated voltage;
• A : Voltage stability
• D : Pitch (1.6mm);
• A : Termination;
• 330 : Capacity 330µF
• MJ : ESR (0.35 Ohm at 100KHz)
• A0 : Rated ripple current (1.0 A)
• G : Max life (45000 hours)

The working principle of an aluminum electrolytic capacitor can be simplified, compared with a design based on an electrolyte solution, as an electrochemical cell in which the anode is a corroding aluminum and the cathode is the solid, electrically conductive electrolyte. The electrolyte acts as the cathode and a gas, such as oxygen, is formed at the anode. When the current flows, a chemical reaction occurs and charges move from one media to another, leaving the anode charged with a positive charge. The electric field created by the electrolyte attracts the charges and forms a negative charge at the cathode. This charge imbalance is responsible for the capacitance generated in the cell.Aluminum electrolytic capacitors have several advantages compared to other capacitor technologies. They are generally considered to be the capacitors with the highest capacitance per volume, meaning they are ideal for high frequency applications with high current requirements, such as video or audio circuits, AC power supply filtering or noise suppression. They are cheaper than other types of capacitors and reliable, with long operating life usually measured in decades. In addition they feature an excellent impedance behavior, allowing high stability of the circuit output despite changes in temperature or frequency conditions. This is due to their low Equivalent Series Resistance (ESR) values, which also contributes for their high current rating. All these features make aluminum electrolytic capacitors ideal for applications such as AC power supplies, high current DC-DC converters, noise suppression, filtering high frequency signals and many others.Here are some of the main characteristics of the EMVH630ADA330MJA0G aluminum electrolytic capacitor:

• Voltage: 630 Volts
• Package: SMD
• Capacity: 330µF
• ESR: 0.35 Ohm at 100KHz
• Max current: 1.0 A
• Max life: 45000 hours
• Operating temperature: -40°C to +105°C

The EMVH630ADA330MJA0G is a robust and reliable device, ideal for a wide range of high frequency power supply and noise suppression applications, including power inverters, DC-DC converters, ripple current suppression, electronic ballasts and many others. Thanks to its low ESR and long life, it is also an excellent choice for motor control circuits and other high current applications.Aluminum electrolytic capacitors are widely used in modern electronics, and the EMVH630ADA330MJA0G is a perfect example of how this type of capacitor can provide superior performance and reliability in power supply, motor control and noise suppression applications.

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