B41022A7476M

Aluminum electrolytic capacitors are the most popular types of capacitors which are used in a broad range of applications, from sensor applications to filter applications. The B41022A7476M, part of this broad family, is a cost-effective radial aluminum electrolytic capacitor that provides low equivalent series resistance (ESR), high capacitance, and low self-inductance.

The main parameters for the B41022A7476M are rated voltage of 16VDC, capacitance of 47 μF, capacity tolerance of 20%, and temperature coefficient of -15/+85°C. It has a physical size of 8x11 mm and a rated current of 0.8 mA with an impedance of 10 Ohms. This compact capacitor makes a suitable choice for applications that require a low voltage with a moderate capacitance. Some of these applications include LED lighting, automotive, power supplies, motors, regulators, and decoupling.

The B41022A7476M consists of an anode, a cathode, a dielectric layer of aluminum oxide, electrolyte, and a terminated soldering pad. Its anode is made out of aluminum foils for maximum capacitance in the same volume. Its cathode is an aluminum foil coated with conductive material such as graphite which helps minimize leakage current. Underneath the anode and the cathode is a semiconductor oxide layer with oxy-hydroxide, and to increase the capacitance, it is typically plated with electrolyte. The electrolyte provides several functions; it acts as an adhesive medium to maintain contact between the anode and the cathode, supplies ions to the capacitance of the anode, assists the formation of the oxide layer, and helps reduce the internal ESR.

The B41022A7476M\'s working principle revolves around a process called dielectric absorption which requires the application of a voltage to form a stable oxide layer on the aluminum. With the voltage applied, positive charges will form at the anode while negatively charged ones will form at the cathode. To complete the dielectric absorption, electrons from the anode start to move onto the oxide layer and convert it into an insulating material. This dielectric absorption process is what makes aluminum electrolytic capacitors capable of achieving very high capacitance in a single component.

The B41022A7476M also provides notable advantages such as small size, low cost, high volumetric efficiency, nonlinear capacitance, and long lifetime. It is also much more reliable than tantalum capacitors, making it a preferred choice for many designers. Additionally, it can withstand high temperatures, is easy to solder due to the soldering pad, and requires minimal maintenance.

In conclusion, the B41022A7476M is an economical, efficient, and reliable aluminum electrolytic capacitor which makes it an ideal solution for many applications in need of low voltage and a moderate capacitance. It has a wide variety of features and advantages that make it the perfect choice for designers.