The PCS4D18-3R9N-RC from Allied Components International is a Power Inductor with Inductance 3.9 µH, Inductance Tolerance ±30 %, DCR 0.155 ohm, Saturation Current 0.88 A, Temperature Operating Range -30 to 100 Degree C. Tags: Surface Mount. More details for PCS4D18-3R9N-RC can be seen below.