This part is a kind of semiconductor called SB50-09.

Function of this product has 90V/ 5A Rectifier.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN2685A SB50-09 Schottky Barrier Diode (Twin Type · Cathode Common) 90V, 5A Rectifier Applications · High frequency rectification (switching regulators, converters, choppers). Package Dimensions unit:mm 1159A [SB50-09] Features · Low forward voltage (VF max=0.85V). · Fast reverse recovery time (trr max=35ns). · Low switching noise. · Low leakage current and high reliability due to highly reliable planar structure. JEDEC:TO-220AB EIAJ:SC-46 C:Cathode A:Anode Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Repetitive Peak Reverse Voltage Nonrepetitive Peak Reverse Surge Voltage Average Output Current Surge Forward Current Junction Temperature Storage Temperature Symbol VRRM VRSM IO IFSM Tj Tstg Conditions Ratings 90 95 Unit V V A A 50Hz, resistiv [ ... ]

SB50-09 PDF Datasheet Download