This part is a kind of semiconductor called 2SB764.

Function of this product has Voltage Regulator/ Relay Lamp Driver Electrical Equipment Applications.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:575D PNP/NPN Epitaxial Planar Silicon Transistors 2SB764/2SD863 Voltage Regulator, Relay Lamp Driver Electrical Equipment Applications Package Dimensions unit:mm 2006A [2SB764/2SD863] ( ) : 2SB764 EIAJ : SC-51 SANYO : MP Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Collector Dissipation Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC ICP PC Tj Tstg Conditions Ratings B : Base C : Collector E : Emitter Unit (–)60 (–)50 (–)5 (–)1 (–)2 0.9 150 V V V A A W ˚C ˚C –55 to +150 Electrical Characteristics at Ta = 25˚C Parameter Collector Cutoff Current Emitter Cutoff Current DC Current Gain Gain-Bandw [ ... ]

2SB764 PDF Datasheet Download