This part is a kind of semiconductor called B180BQ.

Function of this product has 1.0A HIGH VOLTAGE SCHOTTKY BARRIER RECTIFIER.

Manufacturers : Diodes

Image and pinout :

Some of the text within the PDF file :

Product Summary (@+25°C) B170BQ VRRM (V) 70 IO (A) 1.0 VF max (V) 0.79 B180BQ VRRM (V) 80 IO (A) 1.0 VF max (V) 0.79 B190BQ VRRM (V) 90 IO (A) 1.0 VF max (V) 0.79 B1100BQ VRRM (V) 100 IO (A) 1.0 VF max (V) 0.79 Applications  Polarity Protection Diode  Re-Circulating Diode  Blocking Diode  DC-DC  AC-DC Green B170BQ - B1100BQ 1.0A HIGH VOLTAGE SCHOTTKY BARRIER RECTIFIER IR max (mA) 0.5 IR max (mA) 0.5 IR max (mA) 0.5 IR max (mA) 0.5 Features and Benefits  Guard Ring Die Construction for Transient Protection  Ideally Suited for Automated Assembly  Low Power Loss, High Efficiency  Surge Overload Rating to 125A Peak  For Use in Low Voltage Drop, High Frequency Inverters, Free Wheeling, and Polarity Protection Application  High Temperature Solder [ ... ]

B180BQ PDF Datasheet Download