This part is a kind of semiconductor called 7905.

Function of this product has Three Terminal Negative Voltage Regulator.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Three Terminal Negative Voltage Regulator 7905 FEATURES ·Output current in excess of 1.5 A ·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 -35 V Io Output current internally limited Ptot Power dissipation internally limited TOP Operating junction temperature 0~125 ℃ Tstg Storage temperature -55~150 ℃ THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNIT Rth j-c Thermal Resistance, Junction to Case 5 ℃/W Rth j-a Thermal Resistance,Junction to Ambient 65 ℃/W isc website：www.iscsemi.com [ ... ]

7905 PDF Datasheet Download