381LQ121M400H022

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.260" (32.00mm)
Size / Dimension:	0.866" Dia (22.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.05A @ 20kHz
Ripple Current @ Low Frequency:	750mA @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	381LQ
Operating Temperature:	-25°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	1.52 Ohm @ 120Hz
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	120µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Aluminum Electrolytic Capacitors are components used in many electronic devices for filters, timing, energy storage, and voltage transformation. By far, they offer the highest capacitance range and highest rated voltage among available capacitor types. The 381LQ121M400H022 is one such capacitor, which is a particularly special product offering many features and advantages.

Capacitor Structure

The 381LQ121M400H022 capacitor consists of an anode made of aluminum foil, a cathode made of a special alloy, two winding layers of film, and a sealed aluminum container. The addition of a solid electrolyte layer prevents leakage current and extends the capacitor’s life. A special feature of this design is that the anode and cathode layers are isolated from each other completely, which allows for a shorter line of current with very low resistance.

Working Principle

The working principle of the 381LQ121M400H022 is quite simple. When a voltage is applied across its terminals, electrons are moved from the anode to the cathode layer, increasing the capacitance of the capacitor. This process forms a storage tank of electrical energy, which is then released when the voltage is removed. This property is what makes Aluminum Electrolytic Capacitors suitable for voltage transformation, energy storage, and timing applications.

Application Field

The 381LQ121M400H022 capacitor has a wide variety of applications due to its low impedance, high capacitance, and long life. It is often used in voltage regulation circuits, power converters, battery management systems, automotive electronics, and many other environments where a reliable, high-capacity capacitor is needed. Its robust design also makes it suitable for use in harsh industrial environments such as extreme temperatures and vibration.

Conclusion

The 381LQ121M400H022 is an aluminum electrolytic capacitor which offers many features and advantages. It is a highly reliable component, capable of being used in a wide variety of applications due to its low impedance, high capacitance, and long life. Its structure and working principle allow it to be used in applications such as voltage regulation, power conversion, and energy storage, making it a great choice for any electronic system.

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