This part is a kind of semiconductor called 2SC3803.

Function of this product has High Frequency Amplifier Applications.

Manufacturers : Kexin

Image and pinout :

Some of the text within the PDF file :

SMD Type Transistors High Frequency Amplifier Applications 2SC3803 Features High Transition Frequency: fT = 200MHz(typ.) Low Collector Output Capacitance: Cob = 3.5pF(typ.) Complementary to 2SA1483 Absolute Maximum Ratings Ta = 25 Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Base Current Collector Power Dissipation Jumction temperature Storage temperature Range * Mounted on a ceramic substrate (250 mm x 0.8t) 2 Symbol VCBO VCEO VEBO IC IB PC PC * Tj Tstg Rating 60 45 5 200 50 500 1.0 150 -55 to +150 Unit V V V mA mA mW W Electrical Characteristics Ta = 25 Parameter Collector Cut-off Current Emitter Cut-off Current DC Current Gain Collector-Emitter Saturation Voltage Base-Emitter Saturation Voltage Transition Frequency Input Impeda [ ... ]

2SC3803 PDF Datasheet Download