Inductors, also known as chokes, reactors, and dynamic reactors. It is an element that can convert electric energy into magnetic energy and store energy in the magnetic field. The structure is similar to the transformer and has the characteristics of DC and AC resistance. In electronic circuits, inductance mainly plays the role of filtering, current limiting, tuning, oscillation, interference suppression and magnetic field generation.
Inductance is an attribute of closed loop and a physical quantity. When the current passes through the coil, a magnetic field induction is formed in the coil, and the induced magnetic field will generate induced current to resist the current passing through the coil. It is a circuit parameter that describes the induced electromotive force effect in this coil or in another coil due to the change of coil current. Inductance is the general term of self inductance and mutual inductance. Devices that provide inductance are called inductors.
Then, what is the maximum current that the inductor can pass?
Strictly speaking, there is no special specification or unified answer standard for the problem of how much current an inductor can generally pass. Why do we say this? It is mainly because the inductance size of different types of inductors is different. Even for the same type of inductor products, there are differences in the current size of different core powder formulas, different winding methods, and different coil turns.
Take the Patch inductor as an example, most of the chip inductors have a relatively small current, which is below 1a. It is possible that the current of 2a and 3a is already a large current for the Patch inductor, while the current of the chip integrated inductors can even be more than 20A. This is only the current difference of the same type of inductance, let alone the current difference of different types of inductance.