The WSF10D40-2R5YQ from AiT Semiconductor is a Power Inductor with Inductance 2.50 µH, Inductance Tolerance ±30 %, DCR 10.5 mOhm, Saturation Current 7.50 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for WSF10D40-2R5YQ can be seen below.