There are the following points to note during the use of inductors:

Current Limitation

The current passing through an inductor must not exceed its rated current. Otherwise, the inductor may be damaged due to overheating, and it may even cause safety accidents. For example, in some power supply circuits, if the current borne by the inductor is too large, it will cause the magnetic core of the inductor to saturate, resulting in a decline in the performance of the inductor and affecting the normal operation of the entire circuit.

Frequency Characteristics

Different inductors are suitable for different frequency ranges. In high - frequency circuits, inductors with good high - frequency characteristics should be selected, such as air - core inductors or inductors with low magnetic - core losses. In low - frequency circuits, iron - core inductors can be selected. If the frequency characteristics of the inductor do not match the circuit, it will cause the inductive reactance of the inductor to change, affecting the filtering and energy - storage functions of the circuit.

Installation Location

Inductors should be installed away from interference sources and heat sources. Since the inductor itself generates a magnetic field, it may interfere with surrounding electronic components. At the same time, the surrounding magnetic field may also affect the performance of the inductor. In addition, heat sources can increase the temperature of the inductor, affecting the stability of its parameters. For example, in some precision electronic devices, inductors are usually installed in special shielding areas to reduce electromagnetic interference.

Prevention of Mechanical Damage

The windings of inductors are usually quite fragile. During installation and use, mechanical shock and vibration should be avoided to prevent short - circuits or open - circuits in the windings. For example, in some vibrating equipment, such as automotive electronic devices, the inductors need to be installed in a reinforced manner to prevent damage caused by vibration.

Polarity Issue

Some inductors are polarized. They must be connected to the circuit with the correct polarity during installation. Otherwise, the inductor may not work properly, and it may even damage other components in the circuit.

Withstand Voltage

The withstand voltage of the inductor should meet the requirements of the circuit. If the voltage in the circuit exceeds the withstand voltage of the inductor, the insulation layer of the inductor will be broken down, causing the inductor to be damaged and further affecting the normal operation of the entire circuit.

Magnetic Core Selection

Select appropriate magnetic - core materials and shapes according to different application scenarios. For example, in power inductors, ferrite magnetic cores are usually selected to improve the energy - storage capacity and efficiency of the inductor. In some high - frequency filtering circuits, air - core inductors or micro - crystalline magnetic - core inductors may be selected to obtain better high - frequency characteristics.

Cooperation with Other Components

Inductors are usually used in combination with components such as capacitors and resistors in a circuit. When designing a circuit, the parameters of these components should be reasonably selected to achieve the best circuit performance. For example, in an LC filtering circuit, the parameters of the inductor and capacitor need to be optimally designed according to factors such as the filtering frequency and load current.