The SLW4010S100MST, manufactured by Sunltech, is a power inductor with 10uH ±20% and a maximum current rating of 800mA. It has a surface mount design (SMD) and measures 4 x 4 x 1mm, with RoHS compliance. It is used in a wide range of applications, such as switching power supplies, DC-DC converters, RF circuits, in-circuit impedance matching, EMI suppression, and signal coupling/decoupling.