SPM4012T-4R7M Inductors, Coils, Chokes

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Fixed inductors are types of inductors, which are commonly used components in circuits, responsible for storing energy in the form of magnetic and electric fields. The SPM4012T-4R7M is one type of fixed inductor that has a range of applications and various technologies for working principles. This article will discuss the application field and working principle of the SPM4012T-4R7M.

Features

The SPM4012T-4R7M fixed inductor has a maximum inductance of 4.7 uH, a rated current of 2.3A, and rated DC resistance of 0.17 Ohm. It is RoHS compliant, with a maximum operating temperature of +125°C and a maximum storage temperature of +150°C. It also has high-frequency characteristics, with a self-resonant frequency of 140MHz, a high saturation current of 9A, and a Q factor of 50. These features make it suitable for use in a wide range of applications.

Application field

The SPM4012T-4R7M fixed inductor has a wide range of applications, including in input/output circuits, low-pass filters, communication equipment, and switch-mode power supplies, where high frequency and low noise are essential requirements. It is particularly useful in high-density circuits due to its small size, and is suitable for use in automotive and consumer electronics, medical systems, and in network infrastructure. It is also suitable for use in industrial, computer, and communications equipment, and for military and aerospace applications.

Working principle

The SPM4012T-4R7M fixed inductor works on a principle of electromagnetic induction. As current flows through the inductor, a magnetic field is produced, which induces a voltage across the coil winding. This voltage is proportional to the rate of change of current through the inductor, resulting in induced voltage increasing in magnitude as the frequency of the current through the inductor increases. As current continues to flow through the inductor, the generated magnetic field induces a greater voltage across the coil, leading to an increased amount of stored energy. This energy is released when the current stops flowing, causing the voltage across the inductor to decrease and the current to decrease. This is known as "inductive reactance" and is used to reduce or block AC signals.

Conclusion

The SPM4012T-4R7M fixed inductor has a wide range of applications and uses a principle of electromagnetic induction for its working principle. Its features make it suitable for use in high-density circuits, applications in communication equipment, and in automotive and consumer electronics. It is also suitable for use in industrial, computer, and communications systems, as well as in military and aerospace applications.

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