This part is a kind of semiconductor called LVS303015.

Function of this product has Sealed Power Inductors.

Manufacturers : Chilisin

Image and pinout :

Some of the text within the PDF file :

Sealed Power Inductors - LVS Series LVS Series LVS series, an automatic assembly power inductor, is shielded with magnetic resin and suitable for the portable DC-DC converter application. Features  RoHS compliant  Highly accurate dimensions can be mounted automatically.  Terminals are highly resistant to pull forces.  Highly reliable in environments of sudden temperature change and humidity.  Superior EMI electrical with ultra low radiation comparing to conventional shielded power inductors. Applications  LCD TV, Monitor, Ap Router, STB, Smart Phone, Touch Panel, DSC, Game Console and other electronic devices. Product Identification Shapes and Dimensions Figure 1 Recommended Pattern Dimensions in mm TYPE LVS201610 LVS252010 LVS252010D LVS252012 LVS252012L LVS252012 [ ... ]

LVS303015 PDF Datasheet Download