This part is a kind of semiconductor called B180Q.

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) B170Q VRRM (V) 70 IO (A) 1.0 VF max (V) 0.79 B180Q VRRM (V) 80 IO (A) 1.0 VF max (V) 0.79 B190Q VRRM (V) 90 IO (A) 1.0 VF max (V) 0.79 B1100Q 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 B170Q - B1100Q 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 Soldering: + [ ... ]

B180Q PDF Datasheet Download