When it comes to the difference between shielded and unshielded in SMD power inductors, we must start with the basic structure of the inductor. Inductance is actually a coil + magnetic core; but some inductances can also be without a magnetic core. This is called an air-core coil, also called an air-core inductor, which uses air as the medium (magnetic core). When the coil is energized, a magnetic field will be generated around it. At this time, the magnetic field goes from the inside to the outside and then back to the inside, forming a closed magnetic field. However, this does not rule out that when part of the magnetic field diffuses outward, the original magnetic core cannot be returned, which will cause part of the magnetic field to be missed, which is a phenomenon of magnetic flux leakage. This is the disadvantage of ordinary inductors. If an extra layer of shielding cover is added to the outside of the coil, those magnetic fields that diffuse outward will be blocked by the shielding cover and will return to the original magnetic core, which greatly reduces the occurrence of magnetic leakage. This is the main function of the shield.
The shielded power inductor is mainly attributed to the shielding cover wrapped outside, which can greatly reduce the leakage of magnetic field and protect the internal coil. At the same time, the role of the magnetic core is maximized, so that the electrical performance of the inductor is fully achieved Play.
The main features of shielded power inductors are:
It has the characteristics of high power, high saturation current, low impedance and miniaturization.
Use of shielding power inductor:
Suitable for: video recorders, OA equipment, digital cameras, LCD TVs, notebook computers, small communication equipment, DC/DC converters.
In the past, open-type inductors (unshielded) were widely used. The main benefits were simple structure, easy production, and good economic benefits. Although the performance of shielded power inductors is relatively outstanding, the production process is too cumbersome, which makes labor costs occupy a large part, so the cost issue has also become a disadvantage of shielded power inductors. However, with the development of the economy, intelligence has become more and more popular in our industrial chain; the automation of shielded power inductors has become more and more popular. This will gradually reduce costs. In the future, the use of shielded power inductors will become more and more widespread.
The following is the model table of our unshielded inductors and shielded power inductors:
HCJO32-2R2MT HCJO43-1R0MT HCJO53-1R0MT HCJO54-1R0MT HCJO75-2R2MT HCJO105-100KT
HCJO32-3R3MT HCJO43-1R5MT HCJO53-1R5MT HCJO54-1R5MT HCJO75-4R7MT HCJO105-120KT
HCJO32-4R7MT HCJO43-2R2MT HCJO53-2R2MT HCJO54-2R2MT HCJO75-6R8MT HCJO105-150KT
HCJO32-5R6MT HCJO43-3R3MT HCJO53-3R3MT HCJO54-3R3MT HCJO75-100KT HCJO105-220KT
HCJO32-6R8MT HCJO43-4R7MT HCJO53-4R7MT HCJO54-4R7MT HCJO75-120KT HCJO105-270KT
HCJO32-100MT HCJO43-6R8MT HCJO53-6R8MT HCJO54-6R8MT HCJO75-150KT HCJO105-330KT
HCJO32-150MT HCJO43-8R2MT HCJO53-8R2MT HCJO54-8R2MT HCJO75-220KT HCJO105-390KT
HCJO32-220MT HCJO43-100MT HCJO53-100MT HCJO54-100KT HCJO75-270KT HCJO105-470KT
HCJO32-330MT HCJO43-120MT HCJO53-120MT HCJO54-120KT HCJO75-330KT HCJO105-680KT
HCJO32-470MT HCJO43-150MT HCJO53-150MT HCJO54-150KT HCJO75-390KT HCJO105-101KT
HCJO32-680MT HCJO43-220MT HCJO53-220MT HCJO54-220KT HCJO75-470KT HCJO105-151KT
HCJO32-101MT HCJO43-270MT HCJO53-270MT HCJO54-270KT HCJO75-680KT HCJO105-221KT
HCJO31-2R2NT HCJO43-330MT HCJO53-330MT HCJO54-330KT HCJO75-101KT HCJO105-331KT
HCJO31-3R3NT HCJO43-390MT HCJO53-390MT HCJO54-390KT HCJO75-151KT HCJO105-471KT
HCJO31-4R7NT HCJO43-470MT HCJO53-470MT HCJO54-470KT HCJO75-221KT HCJO105-681KT
HCJO31-5R6NT HCJO43-680MT HCJO53-680MT HCJO54-680KT HCJO75-331KT HCJO105-821KT
HCJO31-6R8NT HCJO43-101KT HCJO53-101KT HCJO54-101KT HCJO75-471KT HCJO105-102KT
HCJO31-100KT HCJO43-151KT HCJO53-151KT HCJO54-151KT HCJO75-681KT
HCJO31-220KT HCJO43-221KT HCJO53-221KT HCJO54-221KT HCJO75-821KT
HCJO31-330KT HCJO43-331KT HCJO54-331KT HCJO54-471KT HCJO75-102KT
HCJO31-470KT HCJO43-471KT HCJO54-681KT HCJO54-102KT HCJO54-222KT
HCJRH0704-2R2MT HCJRH1040-1R5NT HCJRH1040-331MT HCJRH1205-4R7MT HCJRH1207-4R7MT
HCJRH0704-3R3MT HCJRH1040-2R2NT HCJRH1040-471MT HCJRH1205-6R8MT HCJRH1207-6R8MT
HCJRH0704-4R7MT HCJRH1040-3R3NT HCJRH1040-681MT HCJRH1205-8R2MT HCJRH1207-8R2MT
HCJRH0704-6R8MT HCJRH1040-4R7MT HCJRH1040-102MT HCJRH1205-100MT HCJRH1207-100MT
HCJRH0704-8R2MT HCJRH1040-6R8MT HCJRH1050-3R3NT HCJRH1205-120MT HCJRH1207-120MT
HCJRH0704-100MT HCJRH1040-100MT HCJRH1050-4R7MT HCJRH1205-150MT HCJRH1207-150MT
HCJRH0704-120MT HCJRH1040-150MT HCJRH1050-6R8MT HCJRH1205-220MT HCJRH1207-220MT
HCJRH0704-150MT HCJRH1040-220MT HCJRH1050-100MT HCJRH1205-270MT HCJRH1207-270MT
HCJRH0704-180MT HCJRH1040-270MT HCJRH1050-150MT HCJRH1205-330MT HCJRH1207-330MT
HCJRH0704-220MT HCJRH1040-330MT HCJRH1050-220MT HCJRH1205-390MT HCJRH1207-390MT
HCJRH0704-270MT HCJRH1040-470MT HCJRH1050-270MT HCJRH1205-470MT HCJRH1207-470MT
HCJRH0704-330MT HCJRH1040-680MT HCJRH1050-330MT HCJRH1205-680MT HCJRH1207-680MT
HCJRH0704-390MT HCJRH1040-101MT HCJRH1050-470MT HCJRH1205-101MT HCJRH1207-101MT
HCJRH0704-470MT HCJRH1040-151MT HCJRH1050-680MT HCJRH1205-151MT HCJRH1207-151MT
HCJRH0704-680MT HCJRH1040-221MT HCJRH1050-101MT HCJRH1205-221MT HCJRH1207-221MT
HCJRH0704-101MT HCJRH0704-471MT HCJRH1050-151MT HCJRH1205-331MT HCJRH1207-331MT
HCJRH0704-151MT HCJRH0704-681MT HCJRH1050-221MT HCJRH1205-471MT HCJRH1207-471MT
HCJRH0704-221MT HCJRH0704-821MT HCJRH1050-331MT HCJRH1205-681MT HCJRH1207-681MT
HCJRH0704-331MT HCJRH0704-102MT HCJRH1050-471MT HCJRH1205-821MT HCJRH1207-821MT
HCJRH1205-102MT HCJRH1207-102MT