It can be seen from the external packaging mode that the SMT inductor has no pin; The plug-in inductor obviously has a very long pin; Although the plug-in inductance has obvious advantages in cost; But the power inductor of SMT can reduce the manual of plug-in; The maximum advantage patch power inductor has no pins; Can reduce parasitic capacitance; Improve product performance; Improve the quality of products; At the same time, SMT inductor has more performance and power function than plug-in inductor. The life of plug-in inductor is short. At the same time, the magnetic shielding power of SMT inductor is better. Conducive to the increase of magnetic permeability; Enhance the magnetic strength and also ensure the product performance.