LGW2G121MELZ30

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are one of the most popular capacitors used in electrical and electronic circuits. They are usually made of aluminum or tantalum as the anode and are filled with an electrolyte that acts as a conductor. The electrolyte is usually an aqueous solution of potassium hydroxide, and the dielectric is an oxide film on the foil of the anode. Aluminum electrolytic capacitors are very useful components because they have a relatively high energy density, an extremely long life span, a very low leakage current, and a low electrical resistance. As a result, they are commonly used in high-frequency applications where higher voltage, higher ripple current, and higher capacitance are important.

The LGW2G121MELZ30 is an aluminum electrolytic capacitor. It is a radial leaded snap-in capacitor with a maximum voltage rating of 450V at +105°C. It features an operating temperature range of -40°C to +105°C and a capacitance of 12000uF at a rated voltage of 130Vdc. The device also has very low equivalent series resistance (ESR) and inductance for high-frequency applications. In addition, it has high ripple current capability and low leakage current.

Applications

The primary application of the LGW2G121MELZ30 aluminum electrolytic capacitor is in power-factor correction circuits. It is suitable for use in circuits that require high capacitance and low resistance, such as AC adapters, input circuits, and filtering circuits. The device has a very low ESR which makes it particularly suitable for high-frequency applications. It can also be used in DC-DC converters, flicker filters, rectifier circuits, and switching power supplies.

Working Principle

An aluminum electrolytic capacitor works by incorporating a thin oxide layer between two electrodes. When a voltage is applied, the oxide layer forms a dielectric between the two electrodes, allowing for the storage of an electrical charge. The charge, or capacitance, is determined by the size and type of the oxide layer. As the voltage across the capacitor increases, more charge is stored, and the capacitance of the capacitor increases. However, when the voltage across the capacitor exceeds the maximum approved voltage for the device, the oxide layer is damaged and the capacitor can no longer store charge.

The LGW2G121MELZ30 aluminum electrolytic capacitor has a specified maximum voltage rating of 450V. This rating is based upon the oxide layer’s ability to withstand a voltage of up to 450V without failing. The maximum operating temperature of the capacitor is rated at +105°C, which is higher than most standard aluminum electrolytic capacitors. This allows the device to operate reliably in applications with elevated temperatures while still maintaining peak performance characteristics.

In addition to its working principle, the LGW2G121MELZ30 also benefits from its high capacitance and low ESR ratings. Its high capacitance rating of 12000uF, combined with its low ESR rating, provides excellent filtering performance, allowing it to reduce noise both within and between circuits. The low ESR rating ensures that the capacitor is able to handle high ripple currents while still maintaining superior performance characteristics.

The combination of these characteristics make the LGW2G121MELZ30 aluminum electrolytic capacitor an ideal component for a wide range of applications, including power-factor correction, AC adapters, input circuits, filtering circuits, DC-DC converters, flicker filters, rectifier circuits, and switching power supplies.