SP1812R-124K

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Fixed Inductors are components used widely in electrical and electronic engineering applications. One type of fixed inductor is the SP1812R-124K, which is typically used in consumer and automotive electronic designs. This article will discuss the SP1812R-124K’s application field and working principle.

The SP1812R-124K is a chip-style surface-mount inductor designed to operate over a wide temperature range. The device consists of a ferrite core, an inductor winding, and a plastic shell. It is available with an inductance range of 10 to 100 uH, and its rated current is up to 500 mA.

The SP1812R-124K is suitable for both AC and DC applications, and it is often used in DC-DC converters, power suppliers, and other automotive electronic components. The device is capable of operating on input voltages between 4.2V and 18V, and is designed to provide excellent EMI suppression. The inductor’s low profile is also an advantage, making it suitable for use in tight spaces.

When used in AC circuits, the SP1812R-124K acts as an impedance, limiting the current flow in the circuit. The inductor is able to absorb energy over a wide frequency range, from below 20 Hz up to more than 100M Hz, making it suitable for applications that require a wide range of AC frequency response. The inductor’s high current rating of up to 500 mA also makes it suitable for high-power applications.

In DC circuits, the SP1812R-124K acts as a form of energy storage, and is able to absorb energy from an incoming current and release it back when the current level drops. The inductor’s high current rating and wide operating voltage range make it suitable for use in automotive devices such as motor speed controllers and driver amplifiers. Additionally, the device’s low profile design makes it appropriate for use in limited space applications.

The working principle of the SP1812R-124K is relatively simple. The device consists of a ferrite core, which serves as the inductor material, an inductor winding, which carries the current, and a plastic shell which houses the core and winding. When a current is passed through the winding, it produces a magnetic field, which is then attracted to the ferrite core. The effect of this attraction is to cause the current in the winding to be limited or “choked”, which in turn reduces the amount of current that flows through the circuit.

In summary, the SP1812R-124K is a chip-style surface-mount inductor designed for applications requiring low-profile and high current handling. The inductor is capable of operating over a wide range of temperatures and voltages, and its high current rating makes it suitable for use in high power applications. The inductor’s working principle is based on the attraction of a magnetic field to a ferrite core, which limits the current flowing through the circuit. As a result, the SP1812R-124K is suitable for use in AC as well as DC circuits.

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