LGN2G391MELB40

Aluminum electrolytic capacitors include non-solid, solid and hybrid aluminum electrolytic capacitors. LGN2G391MELB40 is a non-solid aluminum electrolytic capacitor.

The anode of a non-solid aluminum electrolytic capacitor is usually a pure aluminum piece with several hundreds of embedded vertical parallel half leather tubes. The cathode is made of solid aluminum oxide. The electrolyte of most modern aluminum electrolytic capacitors is a solution of ethylene glycol mixed with boric acid and glycerin, which is used instead of the oil used in vintage aluminum electrolytic capacitors.

Application Field

LGN2G391MELB40 is widely used in many applications ranging from power supplies, charging circuits, motor and instrumentation applications. It offers a high insulation resistance and low ESR, making it suitable for high frequency electronics applications as well. It is typically used in coupling, decoupling, and AC applications.

Working Principle

The working principle for LGN2G391MELB40 is based on the application of a high electric field to the metal and insulating layers of the electrolytic capacitor. The electric field is established via electrolytic oxidation of the metal layer at the anode, thus forming a metal oxide barrier layer on the metal. This field causes a space charge to become trapped in the metal and insulating layers, resulting in a relatively high capacitance rating. In addition, this metal oxide layer is highly resistant to current flow, causing the capacitor to function as an electrical insulator.

These capacitors offer a variety of advantages, including a high capacitance rating, high ripple current capabilities, long service life and good stability. Additionally, they offer good temperature coefficient and low ESR. While their larger physical size limits them in some applications, their overall performance makes them an outstanding choice for many applications.