This post explains for the Voltage Regulator.
The Part Number is UTC7805.
The function of this semiconductor is 3 TERMINAL 1A 5A POSITIVE Voltage Regulator.
The package is TO-220 Type
Manufacturer: YOUW ANG
Preview images :
The UTC7805 series o three-terminal positive regulators are available in TO-220 package and with several fixed output voltage, making them useful in a wide range of application. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided ,they can deliver over 1A output current, Although
designed as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents. […]
1. Output current up to 1A
2. 5V output voltage available
3. Thermal overload protection
4. Short circuit protection
5. Output transistor SOA protection