The CSDS4D18N3R3T from Cal-Chip Electronics is a Power Inductor with Inductance 3.3 µH, Inductance Tolerance ±30 %, DCR 0.110 ohm, Saturation Current 1.04 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for CSDS4D18N3R3T can be seen below.