This part is a kind of semiconductor called MUR1640.

Function of this product has (MUR1605 - MUR1660) Super Fast Glass Passivated Rectifier.

Manufacturers : MCC

Image and pinout :

Some of the text within the PDF file :

MCC Micro Commercial Components TM
  omponents 20736 Marilla Street Chatsworth    !"# $ %    !"# Features • • • • • Glass passivated chip Super fast switching time for hight efficiency Low reverse leakage current High surge capacity Case Material: Molded Plastic. UL Flammability Classification Rating 94V-0 MUR1605 THRU MUR1660 16 Amp Super Fast Glass Passivated Rectifier 50 to 600 Volts Maximum Ratings • • Operating Temperature: - 55°C to +155°C Storage Temperature: - 55°C to +155°C MCC Catalog Number MUR1605 MUR1610 MUR1620 MUR1630 MUR1640 Device Marking Maximum Recurrent Peak Reverse Voltage 50V 100V 200V 300V 400V Maximum RMS Voltage Maximum DC Blocking Voltage TO-220AC B L M D K A PIN 1 2 [ ... ]

MUR1640 PDF Datasheet Download