B43740A5338M3

Polarization:	Polar
Package / Case:	Radial, Can - Screw Terminals
Mounting Type:	Chassis Mount
Surface Mount Land Size:	--
Height - Seated (Max):	5.185" (131.70mm)
Size / Dimension:	3.028" Dia (76.90mm)
Lead Spacing:	1.248" (31.70mm)
Impedance:	32 mOhms
Ripple Current @ Low Frequency:	11.4A @ 100Hz
Applications:	General Purpose
Ratings:	--
Series:	B43740
Operating Temperature:	--
Lifetime @ Temp.:	6000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	27 mOhm @ 100Hz
Voltage - Rated:	450V
Tolerance:	±20%
Capacitance:	3300µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to Aluminum Electrolytic CapacitorsAluminum electrolytic capacitors are electrical components used in a variety of electronic circuits. They are inclusive of any electrolytic capacitor with an aluminum canister as its outer casing. Aluminum electrolytic capacitors are often referred to as simply electrolytic capacitors, tantalum electrolytic capacitors, or polarized capacitors. They are typically shaped like small cylinders and come in a variety of sizes and capacities to fit a variety of applications.Aluminum electrolytic capacitors differ from regular capacitors in that they employ an anode foil made of pure aluminum that is etched with a series of geometric shapes, which increase the surface area of the capacitor thereby increasing its capacitance value. The anode is covered with an oxide layer that acts as the dielectric for the capacitor. The electrolyte, an ionic solution, is then injected between the anode and cathode foils to form the electrolyte layer. Each current applied to the capacitor causes a current-carrying electrolyte layer to form on the surface of the capacitor’s anode and cathode foils.Aluminum electrolytic capacitors are used in a variety of applications, most commonly in power supplies or other high-voltage applications, e.g., cells, batteries, dc-dc converters, or LED lighting. The main applications are filtering, smoothing, decoupling, and frequencies selection. They are also used as an energy storage device for backing up power.B43740A5338M3: Application Field and Working PrincipleThe B43740A5338M3 is an aluminum electrolytic capacitor with a maximum capacitance of 4700µF at 6.3V. This capacitor is designed for use in applications that require high capacitance values in a relatively small footprint. It is a surface mount device that has a rated operating temperature range of -40°C to +105°C, making it perfect for outdoor installations.The polar capacitor works on the principles of capacitance and electrostatic field. Its capacitance is determined by the total surface area, which is made up of two conducting plates that are separated by an insulating dielectric layer. This layer is created when a thin oxide film is formed on the aluminum foil of the capacitor. This insulating layer is usually a gel or an electrolyte, which is injected into the capacitor. When a voltage is applied to the capacitor, electrons cross the oxide layer and thus generate electrostatic field between the two plates. This electrostatic field scales up voltage and current, while also providing a smoothing effect to the AC power.The B43740A5338M3 aluminum electrolytic capacitor also exhibits a wide range of frequency values and long life expectancy. Its extended life expectancy is due to its electrolyte containing higher temperatures, improving the renewability of capacitance leading to longer operating life. The huge capacitance of the capacitor makes it suitable for high frequency operations, such as switch-mode power supplies and transformer-based power supplies.Aluminum electrolytic capacitors are most commonly used in power supplies and other high-voltage applications. Their high Capacitance and long life expectancy make them ideal for these types of applications, although they are also suitable for other applications that require a higher Capacitance value, such as filters, smoothing, decoupling, and frequency selection.ConclusionAluminum electrolytic capacitors are versatile components that can be used in a variety of applications. The B43740A5338M3 is a specific capacitor that exhibits a high capacitance in a small package, making it ideal for use in applications that require a high capacitance in a relatively small footprint. It has a wide operating temperature range and is suitable for high frequency operations. Its extended life expectancy and high capacitance make it perfect for powering high-voltage applications, such as power supplies, cells, batteries, dc-dc converters, and LED lighting, as well as for filters, smoothing, decoupling, and frequency selection.

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