This part is a kind of semiconductor called 21PT20.Function of this product has (21PT Series) 20 AMP ENCAPSULATED RECTIFIER DIODES. Manufacturers : International Rectifier Image and pinout : Some of the text within the PDF file : [ ... ] 21PT20 PDF Datasheet Download Metablog 2017/10/25 22:10 2017/10/25 22:10