B43703B4129M000

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Aluminum electrolytic capacitors are an essential element in the modern engineering world as they are capable of storing a significant amount of energy and are used to assist in power management and signal conditioning in practically all electronic and electrical applications, ranging from the domestic to the military field. The B43703B4129M000 is an aluminum electrolytic capacitor of the conventional wet-type structure and is typically used in applications with an operating temperature of −55°C to +125°C.

The B43703B4129M000 is capable of achieving a capacitance of up to 4,100 μF with a rated voltage of 5.8 V, translated to a capacitance per voltage of 0.7 μF/V. Its lifetime is up to 3000 h at 125°C, featuring a very low equivalent series resistance (ESR) of 0.08 Ω at a frequency of 1 kHz, as well as a very low equivalent series inductance (ESL) of 0.1 μH at the same frequency. The capacitor also features a long-term stability of less than 10% measured by its temperature drift and its electrical behavior.

The working principle and structure of aluminum electrolytic capacitors are based on the so-called “electrolytic” principle, which is basically a multi-layer flow field structure that involves a number of interface layers, such as a dielectric and a liquid electrolyte. The electrolyte layer forms the interface between the capacitor’s conductors and the electrodes, and it is the source from where the electric charge is stored in the capacitor during operation.

When an electric potential is applied between the capacitor\'s terminals, a flow of electrons is released from the positive terminal through the dielectric body and into the electrolyte, and an ionic current flows from the electrolyte into the negative terminal. This alternating current produces changes in the ionic mobility and the electric field, resulting in an increase in the capacitor’s capacitance and a decrease in the electrolyte’s resistivity.

The composition of the B43703B4129M000 also allows it to be used in applications with a wide voltage range, from the low-voltage micro-controller segments to the power supply section. It is also suitable for high-frequency and pulse charging applications, given its ESR and ESL parameters. Furthermore, due to its long life, low ESR and ESL values, the capacitor is highly reliable and inherently stable over temperature.

Overall, the B43703B4129M000 aluminum electrolytic capacitor is an excellent choice for applications that require high-quality components with a wide voltage range, high reliability, and stability over temperature, as well as long lifetimes.

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