The PIA4018-R56YQ from AiT Semiconductor is a Power Inductor with Inductance 0.56 µH, Inductance Tolerance ±30 %, DCR 30.0 milli-ohm, Saturation Current 4500 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for PIA4018-R56YQ can be seen below.