3-terminal 1a Positive Voltage Regulator

  The LM78XX series of three terminal positive Regulators are available in the TO-220 package and with several ?xed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as ?xed Voltage Regulators these devices can be used with external components to obtain adjustable voltages and currents.LM7812's datasheet is the same as LM7805
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LM7805 pinout from datasheet
Fairchild Semiconductor

Download LM7812 datasheet