4SXE120M1.9X7.3

Aluminium-Polymer Capacitors

Aluminium-Polymer capacitors (Al-Poly) are a unique type of multi-layer capacitors that combine the technologies of both aluminum electrolytic and polymer film capacitors. Currently, Al-Poly capacitors are among the most widely used capacitors available, and are found in a variety of electronic products and components.

4SXE120M1.9X7.3 Application Field and Working Principle

Al-Poly capacitors have many advantages over traditional types of capacitors, such as higher capacitance, lower ESR, and more consistent performance over temperature and frequency. 4SXE120M1.9X7.3 is an example of an aluminum-polymer capacitor that is specifically designed for automotive applications. It has a maximum operating temperature of 130°C, a rated ripple current of 7.3A and a capacity of 120 μF.

The 4SXE120M1.9X7.3 capacitor\'s construction consists of four layers, communicating between each other. The first layer is an anode sheet, the second layer is a dielectric sheet and the third layer is a cathode sheet. The fourth layer is an organic solid polymer electrolyte containing a charge transfer counter-ion, which provides a relative permeability of the anodic and capacitive layers as well as stabilizing the capacitor\'s characteristics over time and temperature.

When the capacitor is in operation, electricity is supplied to the anode and cathode sheets. The electric field generated between the two sheets causes a redistribution of the charge carriers in the dielectric. This increases the capacitance and creates a charge distribution between the two sheets. The fourth layer acts as an electrolyte, balancing the charge between the two electrodes, resulting in the highest capacitance possible.

The 4SXE120M1.9X7.3 has a few unique distinguishing characteristics. For example, it can withstand higher operating temperatures than many other aluminum-polymer capacitors and can excel in automotive power applications. The 4SXE120M1.9X7.3 also offers good ripple current and low ESR performance, and is characterized by very low leakage current and low electrosound noise.

Al-Poly capacitors, such as the 4SXE120M1.9X7.3, provide many benefits for a wide range of applications. They are very reliable, offer high capacitance and excellent frequency characteristics, and provide low ESR and good ripple current performance. With all these features and more, Al-Poly capacitors are a great choice for industrial, automotive and consumer electronics applications.