The RDR855-4R1M-LF from Coilmaster Electronics is a Power Inductor with Inductance 4.1 µH, Inductance Tolerance ±20 %, DCR 31 milli-ohm, Saturation Current 3.6 A, Temperature Operating Range -45 to 125 Degree C. Tags: Through Hole. More details for RDR855-4R1M-LF can be seen below.