The 121AT1003VSM from Gowanda Electronics is a Power Inductor with Inductance 100 µH, DCR 65 milli-ohm, Saturation Current 3400 to 4700 mA, SRF 2 MHz, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for 121AT1003VSM can be seen below.