This post explains for the Voltage Regulator 7808.
The Part Number is 7808, KA7808, MC7808AC, MC7808C.
The function of this semiconductor is 3-Terminal, 1A, 8V, Positive Voltage Regulator.
Manufacturers : Fairchild Semiconductor, Motorola
The KA7808 / KA78 8A / 7808 series of three-terminal positive regulator are available in the TO-220/D-PAK package and with several fixed 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 fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. […]
1. Output Current up to 1A
2. Output Voltages of 8V
3. Thermal Overload Protection
4. Short Circuit Protection
5. Output Transistor Safe Operating Area Protection