SP1812-473G

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Fixed Inductors

Inductors are passive electrical components that store energy within a magnetic field created by the current flow through the inductor itself. The SP1812-473G is a fixed inductor designed to be used in both low and high-frequency applications.

Application Field

The SP1812-473G is highly recommended for applications requiring large-signal handling, such as low-voltage audio circuits. It can also be used in switching supplies, DC-DC converters, and other circuit applications running at frequencies up to 5 MHz.

The SP1812-473G provides superior voltage handling capability compared to a number of competing products. This is an important factor for products that will be subject to sudden and substantial electrical voltage changes, as the inductor is designed to be able to absorb any changes in the current flow through the circuit without damaging components or disrupting the signal.

The SP1812-473G comes in two sizes; the 0805 package or 1210 package. The 0805 package measures at 2.0mm × 1.25mm and the 1210 package measures at 3.2mm x 2.5mm, making them compatible with most board designs. Both packages feature an inductance of 47 μH with a tolerance range of ±20%.

Working Principle

An inductor works on the principle of Faraday\'s Law of Induction. This law states that the voltage induced in a conductor due to a changing magnetic field is proportional to the rate of change of current through the conductor. In the case of the SP1812-473G, when current flow rises or falls, an opposing voltage is produced within the coil of the inductor, due to the changing magnetic field. This opposing voltage is designed to stabilize the current flow, allowing the inductor to absorb sudden and large electrical voltage changes without damaging components or disrupting the signal.

The SP1812-473G also features a high Q factor of 19. This means that it can store higher amounts of energy within its magnetic field for a given volume of inductor. This is a higher value than its competitors, which translates to a more efficient power transfer and improved signal quality.

In conclusion, the SP1812-473G fixed inductor is ideal for a range of applications including low voltages audio circuits, switching supplies, and DC-DC converters. Its superior voltage handling, high Q factor, and compact size makes it one of the best options for designing high efficiency and high quality circuitry.

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