Ratings:	--
Package / Case:	Radial, Can - Screw Terminals
Mounting Type:	Chassis Mount
Surface Mount Land Size:	--
Height - Seated (Max):	4.449" (113.00mm)
Size / Dimension:	1.378" Dia (35.00mm)
Lead Spacing:	0.500" (12.70mm)
Ripple Current @ High Frequency:	5.46A @ 10kHz
Ripple Current @ Low Frequency:	3.9A @ 120Hz
Applications:	General Purpose
Series:	LQR
Polarization:	Polar
Operating Temperature:	-25°C ~ 85°C
Lifetime @ Temp.:	5000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	450V
Tolerance:	±20%
Capacitance:	820µF
Part Status:	Active

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Aluminum Electrolytic Capacitors

Introduction

An aluminum electrolytic capacitor (AEC) is a type of capacitor that can store electrical energy in the form of electrostatic charges and use it as an energy source. AECs are made of two conductors separated by a very thin electrolytic layer. They are known for their high energy storage capacity and long-term cycle life. They are sometimes referred to as "super capacitors" because of their superior performance over traditional ceramic capacitors.

LQR2W821MSECBN Application Field and Working Principle

The LQR2W821MSECBN is an aluminum electrolytic capacitor specifically designed for high current applications. Its construction consists of a very thin aluminum oxide dielectric with an electrolyte feedback and continuously fillable contact between the aluminum foil and the dielectric. The electrolyte allows the current to flow and minimizes internal losses by keeping the contact surface area very low.The LQR2W821MSECBN is used in a variety of power supply designs, such as switching power supplies, light dimmers, and ultrasonic transducers. The capacitors can also be used in AC and DC applications, as long as they remain in the low-voltage range.When designing equipment with LQR2W821MSECBN, it is important to consider the ambient temperature and the desired life cycle, as this will affect the current-ranging capabilities of the capacitor. Also, the design needs to consider the ripple-current rating of the capacitor, so that it is not overloaded and its cycle life is not significantly reduced.

Electrical Characteristics and Design Considerations

The most important electrical characteristics of the LQR2W821MSECBN are its large capacitance (800µF) and the low ESR (equivalent series resistance) of 1.6mΩ. These characteristics make it suitable for storing and stabilizing large amounts of energy, and for dealing with transients and peak currents.The capacitance and ESR also determine the inherent stability of the capacitor in the circuit. In order to get the most efficient operation out of the capacitor, it is important to keep the ESR as low as possible. This will minimize the heat generated by the capacitor during operation and maximize its cycle life.It is also important to consider the temperature range in which the capacitor is expected to operate. Aluminum electrolytic capacitors are temperature-sensitive, meaning that the capacitance and ESR will vary as the temperature changes. It is therefore important to select a capacitor that has the same temperature rating as the surrounding components.

Conclusion

In conclusion, the LQR2W821MSECBN is an aluminum electrolytic capacitor that can be used in high current applications. Its large capacitance and low ESR make it suitable for storing and stabilizing large amounts of energy and for dealing with transients and peak currents. The design must take into account the capacitance and ESR, as well as the temperature range in which the capacitor is expected to operate in order to maximize its performance and cycle life.

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