(1) The main performance parameters of the SMD inductor include inductance L, DC resistance DCR, DC overlap current Isat, temperature rise allowable capacitance current Irms, and self resonant frequency SRF.

(2) Inductance is the nominal inductance of an inductor, which varies with frequency due to the presence of magnetic permeability and distributed capacitance; The accuracy of inductance is generally M (± 20%) or N (± 30%).

(3) DC resistance DCR refers to the total DC resistance of the enameled wire used between the product electrodes.

(4) DC overlapping current Isat refers to the decrease in the inductance of an inductor when continuous DC current is applied. Generally, the specification is set based on the current value when the inductance decreases by 30%.

(5) Temperature rise allowable current Irms refers to the temperature rise on the surface of an inductor when a continuous DC current is applied. Generally, the specification is set based on the current value when the temperature rises by 40 ℃.

(6) Self resonant frequency (SRF) refers to the interaction between the inductance and the distributed capacitance of the inductance, which causes the inductance to achieve resonance at a certain frequency. The resonance frequency is the self resonant frequency of the inductance, and the power inductance is required to be used below the self resonant frequency.