This part is a kind of semiconductor called 2A05.

Function of this product has (2A01 - 2A07) Silicon Rectifier.

Manufacturers : MCC

Image and pinout :

Some of the text within the PDF file :

MCC TM Micro Commercial Components
  omponents 20736 Marilla Street Chatsworth    !"# $ %    !"# 2A01 THRU 2A07 2 Amp Silicon Rectifier 50 to 1000 Volts DO-15 Features • Lead Free Finish/RoHS Compliant (Note1) ("P"Suffix designates Compliant. See ordering information) • • • • Low Forward Voltage Drop High Current Capability Epoxy meets UL 94 V-0 flammability rating Moisture Sensitivity Level 1 Maximum Ratings • • • Operating Temperature: -55 °C to +150°C Storage Temperature: -55°C to +150°C Typical Thermal Resistance (R θJA) 40°C/W Device Marking Maximum Recurrent Peak Reverse Voltage 50V 100V 200V 400V 600V 800V 1000V Maximum RMS Voltage 35V 70V 140V 280V 420V 560V 700V Maximum DC Blocking Voltage 50V 100V [ ... ]

2A05 PDF Datasheet Download