RR70G821MDN1

Series:	FPCAP, RR7
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Polymer
Capacitance:	820µF
Tolerance:	±20%
Voltage - Rated:	4V
ESR (Equivalent Series Resistance):	7 mOhm
Lifetime @ Temp.:	2000 Hrs @ 105°C
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Applications:	General Purpose
Ripple Current @ Low Frequency:	610mA @ 120Hz
Ripple Current @ High Frequency:	6.1A @ 100kHz
Lead Spacing:	0.197" (5.00mm)
Size / Dimension:	0.394" Dia (10.00mm)
Height - Seated (Max):	0.551" (14.00mm)
Surface Mount Land Size:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Can

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Aluminum-Polymer Capacitors and RR70G821MDN1

Capacitors are electrical components used to store, release and control electrical charge and electrical current. Aluminum-Polymer Capacitors, sometimes known as wet aluminum electrolytic capacitors, are a type of electrical capacitor typically used in power supplies, audio equipment, microprocessors and other electrical components.A RR70G821MDN1 device is a type of Aluminum-Polymer Capacitor designed for operating in a range of high temperature, low voltage applications. Manufactured by Rubycon Corporation, the RR70G821MDN1 is a radial-lead, aluminum-polymer capacitor rated for a working voltage of 8V, with a capacitance rating of 2.2µF, and a 7mm diameter body that is 10mm in length. This device is capable of operating in temperatures ranging from -25 to +85 °C. The RR70G821MDN1 is among the more commonly used models of aluminum-polymer capacitors, so a number of different models may be found on the market featuring various shape, size and capacitance configurations.

Working Principle

The working principle behind Aluminum-Polymer Capacitors can be illustrated through a four layer sandwich consisting of two thin aluminum foils and two layers of a solid polymer electrolyte material. As the electric current passes through the two aluminum layers, the solid polymer resin electrolyte acts as an electrical insulator, and an electric charge begins to accumulate. As the charge accumulates and passes between the two aluminum layers, a voltage potential is formed, and when it passes through the device, it is able to store electrical energy. The electrical charge within the capacitor begins to dissipate over time and the dielectric material, in conjunction with the device’s construction, plays an important role in improving its capacitance, efficiency, and performance. Additionally, capacitance values in aluminum-polymer capacitors tend to stay relatively stable when exposed to changes in temperature, which is one of their main benefits compared to other types of capacitors.

Application Field

Because aluminum-polymer capacitors are able to operate in a broad range of temperatures, they are well suited for use in a wide range of applications. This type of capacitor is commonly used to filter noise and signal frequency, store electrical energy, and stabilize voltage levels in power supplies, amplifiers, motors, and other types of audio and computer equipment. One of the most common uses for aluminum-polymer capacitors is in switching power supplies. This type of capacitor is optimal for use in DC-DC converters, as the voltage does not drop significantly when the electric current passes through. In fact, switching power supplies tend to be more efficient when equipped with aluminum-polymer capacitors compared to those using electrolytic capacitors. Additionally, aluminum-polymer capacitors can also be implemented in solar energy systems, such as solar cell converters and solar charge controllers, providing high efficiency while withstanding temperatures up to 85 °C.

Conclusion

Aluminum-Polymer Capacitors are a type of electrical capacitor suitable for use in a range of high temperature, low voltage applications. The RR70G821MDN1 device, manufactured by Rubycon Corporation, is a radial-lead, aluminum-polymer capacitor designed for use in power supplies, amplifiers, motors and other types of audio and computer equipment. The working principle of aluminum-polymer capacitors can be explained by their four layer sandwich structure, in which two thin aluminum foils are separated by two layers of a solid polymer electrolyte material. This type of capacitor is optimal for use in switching power supplies, solar cell converters and solar charge controllers, due to its ability to withstand temperatures up to 85 °C while providing high efficiency.

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