This part is a kind of semiconductor called LF2003H-A.

Function of this product has For DC Power supply/On board type.

Manufacturers : Soshin

Image and pinout :

Some of the text within the PDF file :

LF2000H-A Series DC Line 48VDC For DC Power supply/On board type Application On-boarded type power supply Specifications Part No. LF2001H-A LF2003H-A LF2006H-A Rated Voltage fig Rated Current 1A 3A 6A 48VDC +6V Frequency Data www.DataSheet.in Circuit Diagram www.DataSheet.in www.DataSheet.in [ ... ]

LF2003H-A PDF Datasheet Download