This part is a kind of semiconductor called 2SC2498.
Function of this product has Silicon NPN epitaxial planer Transistor.
Manufacturers : Toshiba Semiconductor
Image and pinout :

Some of the text within the PDF file :
TOSHIBA Transistor Silicon NPN Epitaxial Planar Type 2SC2498 VHF~UHF Band Low Noise Amplifier Application Maximum Ratings (Ta = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Rating 30 20 3 50 25 300 125 -55~125 Unit V V V mA mA mW °C °C 2SC2498 Unit: mm Microwave Characteristics (Ta = 25°C) JEDEC TO-92 JEITA SC-43 TOSHIBA 2-5F1E Weight: 0.21 g (typ.) Characteristics Transition frequency Insertion gain Noise figure Symbol Test Condition fT ïS21eï2 (1) ïS21eï2 (2) NF (1) NF (2) VCE = 10 V, IC = 10 mA VCE = 10 V, IC = 10 mA, f = 500 MHz VCE = 10 V, IC = 10 mA, f = 1 GHz VCE = 10 [ ... ]
2SC2498 PDF Datasheet Download
