This part is a kind of semiconductor called C2078.

Function of this product has 2SC2078.

Manufacturers : Sanyo Semicon Device

Image and pinout :

Some of the text within the PDF file :

Ordering number:EN462E NPN Epitaxial Planar Silicon Transistor 2SC2078 27MHz RF Power Amplifier Applications Package Dimensions unit:mm 2010C [2SC2078] Specifications JEDEC : TO-220AB EIAJ : SC-46 1 : Base 2 : Collector 3 : Emitter 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 VCER VEBO IC ICP PC Tj Tstg RBE=150Ω Tc=50˚C Conditions Ratings 80 75 5 3 5 1.2 10 150 –55 to +150 Unit V V V A A W W ˚C ˚C Electrical Characteristics at Ta = 25˚C Parameter Symbol Conditions Ratings min typ max Unit Collector Cutoff Current Emitter Cutoff Current DC Current Gain Gain-Bandwidth [ ... ]

C2078 PDF Datasheet Download