LGW2W121MELA30

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.181" (30.00mm)
Size / Dimension:	0.984" Dia (25.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	1.7446A @ 50kHz
Ripple Current @ Low Frequency:	1.22A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	LGW
Operating Temperature:	-25°C ~ 105°C
Lifetime @ Temp.:	3000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	450V
Tolerance:	±20%
Capacitance:	120µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic CapacitorsAluminum electrolytic capacitors are one of the most widely used types of capacitors in circuit designs due to their low cost, high capacitance and wide temperature range. The LGW2W121MELA30 is an electrolytic capacitor that is widely used in a variety of applications due to its increased capacitance and reduced equivalent series resistance (ESR). In this article, we will discuss the various application fields of the LGW2W121MELA30 and its working principle.Application FieldsThe LGW2W121MELA30 is most commonly used as a filter in portable medical and automotive electronics as it is capable of high current performance even at low temperatures. It is also used in telecom, consumer and industrial equipment such as audio devices, motor control and storage devices. Additionally, it is often used to increase the reliability of microprocessor-based circuits.The LGW2W121MELA30 is also well-suited for power supplies, high-frequency pulse circuits, and switching regulator applications. As it is capable of handling high current, it is used to reduce EMI noise in these applications. Its high ripple-current capabilities also make it useful for high-accuracy, long-term applications in extreme temperatures. This makes it ideal for applications in the automotive and aerospace industries.Working PrincipleThe LGW2W121MELA30 utilizes a polarized aluminum electrolytic capacitor design. This design consists of a wound aluminum foil anode, a paper separator, and a liquid cathode, which is comprised of an electrolyte saturated with an acidic solution of ammonium bifluoride, and a manganese dioxide. The combination of the capacitor, the separator, and the electrolyte form a barrier between the anode and cathode, creating an electrochemical reaction that produces a high energy storage medium.As current flows through the capacitor, current flows from the anode to the cathode and the electrolyte acts as a barrier preventing the current from flowing back to the anode, thus creating a voltage potential between the anode and cathode. This potential causes the electrolyte to act as an insulator between the anode and cathode, allowing the capacitor to store energy.The LGW2W121MELA30 also utilizes the wetting effect of the electrolyte to increase its capacitance and reduce its equivalent series resistance. This effect is due to the fact that the electrolyte continuously charges and discharges a portion of itself. This continual charging and discharging of the electrolyte causes the equivalent series resistance to be decreased and the capacitance to be increased.ConclusionIn conclusion, the LGW2W121MELA30 is an aluminum electrolytic capacitor that is most commonly used in portable medical and automotive electronics due to its ability to handle high current, even at low temperatures. It is also suitable for use in noise-reduction and extreme temperatures, such as those found in automotive and aerospace applications. Its polarized design consists of an anode, a separator, and a liquid electrolyte that form a barrier between the anode and cathode, allowing it to store energy. Additionally, its wetting effect enhances its capacitance and reduces its equivalent series resistance.

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