RCH875NP-390K

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Fixed inductors are one of the most important components of electronic circuits. They continue to be used in modern technology, including in digital and analog electronics. RCH875NP-390K is one of the most common types of fixed inductors, and its application field and working principle are described in this article.

RCH875NP-390K is a chip-based inductor mostly used for the power supply network for SMD (Surface Mount Device) and other switching power supply systems. It is rated at 390 mH, with an operating temperature range of -25°C to +85°C, and a tolerance of 20%. It has excellent electrical characteristics, such as low DC resistance ,high tolerance, and high current capability. It is suitable for circuits with low-cost, low-ramp-time requirements and high current handling capacities.

It can be used to filter the output ripple of switching power supplies, reduce the surge current of coils and transformers, and adjust the saturation current of the power supply so that it can reduce the power dissipation of the electronic component. In addition, it can be applied to the input port of the low frequency power amplifier, so as to form a capacitor filter with the capacitor to filter out the high-frequency signal and prevent the input signal from being distorted.

RCH875NP-390K uses the inductor core made of magnetic material to form the inductive core, then by winding a circular copper wire on this core to form the coil element. When the current flows through this coil, an alternating magnetic field is generated around the coil, and this field stores energy. When the current is changing, the torque created by the magnetism interacts with the coil, generating an induced electromotive force, which helps to obtain the inductive effect.

When a changing current is applied to the coil, the magnetic flux and voltage of the coil change accordingly, which affects the number of turns and the structure of the coil. This makes the inductance and voltage of the coil unstable. To reduce the influence of the voltage changes, magnetic shielding is used. This type of inductor consists of a combination of several ferromagnetic cores which creates a low magnetic field when current is applied to the core. The magnetic material shields the outside of the coil, so the alternating current can be reduced, and the inductance can remain unchanged with a changing electric current.

RCH875NP-390K is a fixed inductor with very wide applications. It is often used in switching power supply systems, such as mobile phone, laptop, TV and other kinds of electronic products. It can also be used for the input port of the low frequency power amplifier. In addition, it can be used to filter out the output ripple of switching power supplies, reduce the surge current of coils and transformers, and adjust the saturation current of the power supply, so the power dissipation of the electronic component can be reduced.

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