IR04ST910J

Fixed Inductors

An inductor is a passive two-terminal electrical component which stores energy in a magnetic field when electric current is passed through it. Fixed inductors, also known as “coils”, are a type of pre-manufactured inductors that are made with wire wound into the desired shape. They are different from air core inductors, which do not have ferromagnetic cores. Fixed inductors, unlike their air core counterpart, are widely used in power supply designs, since they are able to tolerate higher peak currents with minimal saturation.

IR04ST910J Application Field and Working Principle

The IR04ST910J is a high-current, high-frequency fixed-inductors manufactured by TDK. It is suitable for high-frequency switching power applications requiring high resistive-inductive characteristics. It has high resonance characteristics and can be used as a power inductor, noise suppression soft magnetic, common-mode choke coil, and inductive load. Its resistance range is 0.71Ω ~ 3.25Ω and its inductance range is 0.82µH ~ 5.3µH.

The working principle of an inductor can be understood with the help of an OHMS Law. According to the law, the voltage across the inductor is proportional to the rate of change of the current through it. This implies that as the current passing through the inductor increases or decreases rapidly, the voltage across it also increases. This change in voltage due to a change in current is the basis of the working of an inductor.

For the application of fixed inductors in high power supply designs, it is important that the inductor can handle high peak currents without saturating. The IR04ST910J is designed to minimize saturation, even when faced with high peak currents. It also has the ability to withstand high temperatures, making it suitable for high-power environments.

In addition to its use as a power inductor, the IR04ST910J can also be used as a common-mode choke coil. Common-mode is defined as the noise voltage appearing in the neutral power line on the output side of the AC power supply. The inductor can suppress noise currents by reducing this common-mode voltage. It works by generating a magnetic field which induces the common-mode voltage to the load side. Thus, the IR04ST910J can offer reliable protection from noise when used as a common-mode choke coil.

In conclusion, the IR04ST910J is a fixed inductor ideal for high power supply designs. It has the ability to tolerate high peak currents while maintaining minimal saturation, and can also be used as a noise suppression soft magnetic or common-mode choke coil. Its ease of use and reliability make it a great choice for applications requiring high-frequency switching power.