This part is a kind of semiconductor called 2SC2078.

Function of this product has NPN Epitaxial Planar Silicon Transistor.

Manufacturers : eleflow

Image and pinout :

Some of the text within the PDF file :

2SC2078 NPN Epitaxial Planar Silicon Transistor Application： High frequency power amplifier High Gain：Gp≥12dB @Vcc=12V. f=27MHz Po=4W Package：TO-220AB Absolute Maximum Ratings at Ta = 25°C Item Collector-to-Base Voltage Collector-to-Emitter Voltage Emitter-to-Base Voltage Collector Current Collector Current (Pulse) Symbol VCBO VCEO VEBO IC ICP PC Junction Temperature Storage Temperature Tj Tstg Ratings 80 35 5 3 5 1.2 10 150 -55---125 Unit V V V A A W W °C °C Electrical Characteristics at Ta = 25°C Item Collector to base voltage Collector to emitter voltage Collector cutoff current Emitter cutoff current Collector to emitter saturation voltage DC current transfer ratio Gain bandwidth product Output capacitance Output power Power efficiency Symbol V(BR)CBO V(BR)CEO ICB [ ... ]

2SC2078 PDF Datasheet Download