This part is a kind of semiconductor called 2SC5090.

Function of this product has Silicon NPN Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN RF Transistor isc RF Product Specification 2SC5090 DESCRIPTION ·High Gain Bandwidth Product fT = 10 GHz TYP. ·High Gain, Low Noise Figure ︱S21e︱2 = 13 dB TYP., NF = 1.1 dB TYP @ f = 1 GHz APPLICATIONS ·Designed for VHF~UHF band low noise amplifier applications. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VCBO Collector-Base Voltage 20 V VCEO Collector-Emitter Voltage 10 V VEBO Emitter-Base Voltage 1.5 V IC Collector Current-Continuous 40 mA IB Base Current-Continuous PC Collector Power Dissipation @TC=25℃ TJ Junction Temperature 20 mA 0.1 W 125 ℃ Tstg Storage Temperature Range -55~125 ℃ isc website：www.iscsemi.cn 1 INCHANGE Semiconductor isc Silicon NPN RF Transistor isc RF Product Specific [ ... ]

2SC5090 PDF Datasheet Download