The SDC4D18-270N-LF from Coilmaster Electronics is a Power Inductor with Inductance 27 µH, Inductance Tolerance ±30 %, DCR 441 milli-ohm, Saturation Current 0.35 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for SDC4D18-270N-LF can be seen below.