SC312MF-4R7

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Fixed inductors are electronic components that store energy in a magnetic field created by electrical current. One of the most widely used types of fixed inductors is the SC312MF-4R7. This device is mainly used in consumer electronics and communication applications.

The SC312MF-4R7, for example, is an axial-leaded component used in switchmode power supplies, pulse transformers, and rectifier filters. It is made of a radial-leaded inductor core wound with copper wire and protected by an epoxy coating. The device is designed to have a minimum inductance of 4.8 mH at a maximum current of 3.2 amperes.

The working principle of the SC312MF-4R7 is based on Faraday’s law of induction. In general, the magnetic field generated by an electric current can induce an electromotive force (EMF) in a nearby conductor, such as a copper coil. In this case, the EMF induced in the coil induces a current in the opposite direction to that of the original current, effectively canceling it out. This phenomenon is known as “back-EMF,” and hence its principle of operation is known as “inductive voltage suppression.”

In order to protect the device against short-circuiting and overload, the SC312MF-4R7 features a built-in thermistor, which acts as a current limiter. When the current exceeds the limiting value, the thermistor heats up, contributing to a voltage drop across the circuit. This helps to protect the device from damage due to excessive current.

The SC312MF-4R7 is also capable of noise suppression, providing stable performance in the presence of surface-mount ripples. This improves the signal-to-noise ratio, particularly in switching power supply applications. The device is also designed to reduce signal distortion, which helps to optimize the performance of digital applications.

Overall, the SC312MF-4R7 is a versatile fixed inductor, capable of delivering reliable performance in a variety of applications. It is easy to install without needing any additional hardware and is relatively inexpensive. Its simplicity and protection against short circuits and overcurrent make it suitable for a wide range of consumer electronics and communication applications.

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