In the field of electronic components, an inductor is a component that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance, which only hinders the current change. Among them, a 4R7 inductor is an inductor component with a specific inductance value. So, how big is a 4R7 inductor?
（★ If you want to know more information, you can refer to the following article: •Inductors are Used in High Frequency Circuits and Switching Power Supplies）
1. Inductance value of 4R7 inductor
The inductance value of a 4R7 inductor is not directly expressed in Henry (H), but a simplified expression method is used. In this expression method, “4R7” can be understood as 4.7, and the unit is usually microhenry (μH). Therefore, the actual inductance value of a 4R7 inductor is 4.7 microhenry (4.7μH). This expression method is concise and clear, and is widely used in the identification of electronic components.
2. Conversion of inductance value
After understanding the inductance value of a 4R7 inductor, we also need to know how to convert it into other units. In the unit conversion of inductance, 1 Henry (H) is equal to 1000 millihenry (mH), and 1 millihenry (mH) is equal to 1000 microhenry (μH). Therefore, if you need to convert 4.7 microhenry (4.7μH) into millihenry (mH), you can divide it by 1000; that is, 4.7μH equals 0.0047 mH. Similarly, if you need to convert it into Henry (H), you need to divide it by 1000 again, that is, 0.0000047H.
3. Application of 4R7 inductor
As a common electronic component, the 4R7 inductor is widely used in various electronic devices. Its main function is to control the change of current by storing and releasing magnetic energy, thereby realizing functions such as filtering, oscillation, and delay. In circuit design, choosing the right inductance value is crucial to ensure the stability and performance of the circuit.
Inductors mainly play the role of filtering, oscillation, delay, trapping, etc. in circuits. They also play the role of shielding signals, filtering noise, stabilizing current, and suppressing electromagnetic interference. The most common role of inductors in circuits is to form LC filter circuits together with capacitors. Capacitors have the characteristics of “isolating direct current and passing alternating current”, while inductors have the function of “passing direct current and isolating alternating current”.
If a DC current containing more interference signals passes through the LC filter circuit, the AC interference signal will be consumed by the inductor in the form of heat energy; when a relatively pure DC current passes through the inductor, the AC interference signal in the inductor will also be converted into magnetic induction intensity and heat energy. The higher the current frequency, the easier it is for the inductor to generate impedance, thereby suppressing higher frequency interference signals. Inductors have the characteristics of preventing AC from passing and allowing DC to pass smoothly. The higher the frequency, the greater the coil impedance, so the main function of the inductor is to isolate and filter the AC signal, or to form a resonant circuit with components such as capacitors and resistors.
Main parameters The main parameters of the inductor include inductance, allowable deviation, quality factor, distributed capacitance, rated current, etc.
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Our company has more than 1,000 types of inductors and 24 years of experience in this field. It is a product that produces extremely low resistance over a wide frequency range. Zhenhua is widely recognized by a global technical team for designing, manufacturing, and providing high-quality, high-performance signal integrity and noise filtering solutions.
Zhenhua brand inductors, or coils or reactors, are passive electronic components that resist changes in the current flowing through them. Core material, winding type and geometry play a critical role in the performance of power inductors. Shipping worldwide. Simply contact us for samples: info@smdinductor.com.
