The 121AT1503SM from Gowanda Electronics is a Power Inductor with Inductance 150 µH, DCR 95 milli-ohm, Saturation Current 3300 to 4800 mA, SRF 1.5 MHz, Temperature Operating Range -55 to 130 Degree C. Tags: Surface Mount. More details for 121AT1503SM can be seen below.