This part is a kind of semiconductor called 7815.

Function of this product has Series Voltage Regulators.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

LM78XX Series Voltage Regulators May 2000 LM78XX Series Voltage Regulators General Description The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these is local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow these regulators to be used in logic systems, instrumentation, HiFi, and other solid state electronic equipment. Although designed primarily as fixed voltage regulators these devices can be used with external components to obtain adjustable voltages and currents. The LM78XX series is available in an aluminum TO-3 package which will allow over 1.0A load current if adequate heat sinking is provided. Curre [ ... ]

7815 PDF Datasheet Download