This part is a kind of semiconductor called 78H05.

Function of this product has Three Terminal Positive Voltage Regulator.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Three Terminal Positive Voltage Regulator 78H05 FEATURES ·Output current in excess of 5.0A ·Output voltage of 5V ·Internal thermal overload protection ·Output transition Safe-Area compensation ·100% avalanche tested ·Minimum Lot-to-Lot variations for robust device performance and reliable operation ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER RATING UNIT Vi DC input voltage 12 V Io Output current Ptot Power dissipation internally limited internally limited TOP Operating junction temperature 0~150 ℃ Tstg Storage temperature -55~150 ℃ THERMAL CHARACTERISTICS SYMBOL PARAMETER Rth j-c Thermal Resistance, Junction to Case MAX 2.5 UNIT ℃/W isc website：www.iscsemi.com 1 isc & iscsemi is registered trademark INCHANGE Semic [ ... ]

78H05 PDF Datasheet Download