UVZ2A4R7MDD

Operating Temperature:	-55°C ~ 105°C
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	0.492" (12.50mm)
Size / Dimension:	0.197" Dia (5.00mm)
Lead Spacing:	0.079" (2.00mm)
Ripple Current @ Low Frequency:	32mA @ 120Hz
Applications:	General Purpose
Ratings:	--
Polarization:	Polar
Series:	UVZ
Lifetime @ Temp.:	1000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	100V
Tolerance:	±20%
Capacitance:	4.7µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are electric double-layer capacitors, composed mainly of an aluminum oxide film and two aluminum foil electrodes coated with special electrolytes. They are widely used in various electronic circuits, and the model UVZ2A4R7MDD is one of the most commonly used capacitors in this field. In this article, we will discuss its application field and working principle.

Application Field

Aluminum electrolytic capacitors with the model UVZ2A4R7MDD are mainly used in circuits with radio frequencies and low-frequency electrical signals. It provides capacitance to control or store electric energy, which is beneficial in circuits that require a large capacitance value. The capacitance of this capacitor is so large that it can store enough electric charge even with a small footprint, which is an advantage in many applications.Another advantage of this model is its low equivalent series resistance (ESR) and low leakage current, which makes it suitable for many applications. It is especially useful when the electronic circuits require low impedance and high stability, such as in DC-DC converters, power supplies, and amplifier circuits. Additionally, it is also used in other industrial product designs, such as audio systems and medical equipment.

Working Principle

The working principle of the aluminum electrolytic capacitor with the model UVZ2A4R7MDD is based on capacitive reactance. This reactance is due to the presence of a conductive electrolyte layer between two aluminum foils, which act as electrodes. The electrolyte layer acts as an insulator, preventing a short circuit but allowing electric charges to flow through it. When a voltage is applied across the terminals of the capacitor, electric charges start to accumulate on the aluminum surfaces, creating an electric double-layer capacitor with huge capacitance. Since the capacitance is determined by the area of the aluminum foils, the larger the surface area of the foils, the larger the capacitance. The fact that the capacitor has a low equivalent series resistance (ESR) is due to its unique structure, in which the anode and cathode are connected in parallel. This allows for higher currents to flow without creating a significant voltage drop within the capacitor. Additionally, the electrolyte layer also contributes to the low ESR of the capacitor, as it serves as an additional source of current.Finally, the capacitor also has a low leakage current, which is beneficial in circuits that require high stability and low noise. This is due to the fact that the electrolyte layer acts as a barrier, preventing electrons from flowing freely between the two electrodes.

Conclusion

To summarize, aluminum electrolytic capacitors with the model UVZ2A4R7MDD are widely used in many electronic circuits, due to their high capacitance, low ESR, and low leakage current. These characteristics make them suitable for applications that require high stability and low noise, such as power supplies, audio systems, and medical equipment. Furthermore, their unique structure also contributes to their high performance, as it allows for higher currents to flow and prevents leakage current.

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