ESMG350ELL221MHB5D

Aluminum Electrolytic Capacitors and ESMG350ELL221MHB5D

An aluminum electrolytic capacitor is a device used for small energy storage in electronic devices. It consists of two aluminum plates or foils separated by a thin insulating layer of an electrolyte. To increase the capacitance of the device, the aluminum surfaces are etched with special shapes or structures. When a difference of potential is applied across the capacitor, a current passes through it, forming a dipole layer of ions around the plates. This layer largely determines the capacitance of the device.

ESMG350ELL221MHB5D Application Field and Working Principle

The ESMG350ELL221MHB5D type aluminum electrolytic capacitor refers to a surface mount device with capacitance 350 µF and operating voltage of 2.5V. The device carries a longer shelf life of 2000 hours at a temperature of 85°C and is mainly used in applications requiring support for high-frequency modulation, such as switching power supplies, mobile phones, inverters, digital products and so on.Compared with ordinary aluminum electrolytic capacitors, the ESMG350ELL221MHB5D model features a great advantage in its low Equivalent Series Resistance (ESR) for the capacitors. Low ESR ensures current leaking from the capacitors is held to a minimum, thus reducing heat produced in the electronics. Consequently, the device can deliver superior performance for its lifetime.

Manufacturing Process

The ESMG350ELL221MHB5D aluminum electrolytic capacitor is manufactured by rolling, punching and other means. It is a single-ended, canned aluminum electrolytic capacitor with a cylindrical shape, which is usually made of aluminum foil, tantalum foil, lead-free solder, non-asbestos paper and other materials.The manufacturing process begins with the curving of the aluminum filaments. This provides a larger surface and more compact packaging, while improving the recovery time of the device. Afterward, the etched aluminum layers are sandwiched between the insulating layers of electrolyte. The device is sealed with a lead-free solder or some other kind of sealant to prevent leakage and corrosion. The tantalum foil is then connected with the two aluminum plates, which form the electrodes of the device. Next, the device is filled with a liquid electrolyte and sealed again with a lead-free solder. The device is then immersed in a saltwater solution for a certain period of time, ensuring that the protective electrolytic layer is completely formed.

Operating Principle

When the ESMG350ELL221MHB5D is used in a circuit, an electric field is generated at the center of the device. This field creates ions in a dipole layer between the aluminum plates. The dipole layer provides a capacitance between the two plates, and the electric field is what affects the capacitance. When a voltage is applied across the terminals of the device, a current is drawn through it. This current passes through the device and charges the capacitance. When the voltage is removed, the charge is stored within the device, thus maintaining the electric potential between the two plates. The capacitor is able to store a large amount of charge, given its low ESR.

Conclusion

The ESMG350ELL221MHB5D aluminum electrolytic capacitor is an ideal choice for applications with frequent switching, such as in switching power supplies and mobile devices. Its low ESR helps to reduce the heat generated in the electronic device, ensuring the device delivers optimal performance over time. The device is made of aluminum, tantalum foil and electrolytic solution and is manufactured through rolling, punching and other methods.