The SMT45A-121 from Gowanda Electronics is a Power Inductor with Inductance 1.2 µH, Inductance Tolerance 0.25, DCR 4.5 milli-ohm, Saturation Current 11250 mA, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for SMT45A-121 can be seen below.