This part is a kind of semiconductor called STR58041A.

Function of this product has hybrid IC voltage regulator.

Manufacturers : Sanken Electric

Image and pinout :

Some of the text within the PDF file :

w w w t a .D S a e h U 4 t e .c m o w w w .D at h S a e 4 et U o .c m [ ... ]

STR58041A PDF Datasheet Download