The CSDS4D22N3R9T from Cal-Chip Electronics is a Power Inductor with Inductance 3.9 µH, Inductance Tolerance ±30 %, DCR 0.040 ohm, Saturation Current 1.30 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for CSDS4D22N3R9T can be seen below.