This part is a kind of semiconductor called 78T12A.

Function of this product has 3-TERMINALS 1A POSITIVE VOLTAGE REGULATOR.

Manufacturers : Unisonic Technologies

Image and pinout :

Some of the text within the PDF file :

UNISONIC TECHNOLOGIES CO., LTD 78TXXA LINEAR INTEGRATED CIRCUIT 3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR 1 „ DESCRIPTION The UTC 78TXXA family is monolithic fixed voltage regulator integrated circuit. They are suitable for applications that required supply current up to 1 A. „ FEATURES 1 * Peak Output Current Up To 1 A * Fixed Output Voltage Of 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V and 18V Available * Thermal Overload Shutdown Protection * Short Circuit Current Limiting * Output Transistor SOA Protection „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free 78TXXAL-TQ2-R 78TXXAG-TQ2-R 78TXXAL-TQ2-T 78TXXAG-TQ2-T 78TXXAL-TQ3-R 78TXXAG-TQ3-R 78TXXAL-TQ3-T 78TXXAG-TQ3-T Note: Pin Code: I: Input G: GND O: Output Package TO-263 TO-263 TO-263-3 TO-263-3 Pin Assignme [ ... ]

78T12A PDF Datasheet Download