This part is a kind of semiconductor called 2SC4703.

Function of this product has MICROWAVE LOW NOISE/ LOW DISTORTION AMPLIFIER NPN SILICON EPITAXIAL TRANSISTOR.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET SILICON TRANSISTOR 2SC4703 MICROWAVE LOW NOISE, LOW DISTORTION AMPLIFIER NPN SILICON EPITAXIAL TRANSISTOR DESCRIPTION The 2SC4703 is designed for low distortion, low noise RF amplifier operating with low supply voltage (VCE = 5 V). This low distortion 4.5±0.1 1.6±0.2 1.5±0.1 PACKAGE DIMENSIONS (Unit: mm) characteristic makes it suitable for CATV, tele-communication and other use. It employs surface mount type plastic package, Power Mini Mold (SOT-89). FEATURES • Low distortion at low supply voltage. IM2
55 dB TYP., IM3
76 dB TYP. @VCE = 5 V, IC = 50 mA, VO = 105 dB
/75 • Large PT with surface mount type package. 0.8 MIN. 0.42 ±0.06 E 1.5 C B 0.42±0.06 0.47 ±0.06 3.0 0.41 +0.05 −0.03 ABSOLUTE MAXIMUM RATINGS (TA = 25
C) Collector to Base Voltage Collect [ ... ]

2SC4703 PDF Datasheet Download