This part is a kind of semiconductor called 2N3839.
Function of this product has NPN SILICON RF TRANSISTORS.
Manufacturers : Central Semiconductor
Image and pinout :
Some of the text within the PDF file :
2N2857 2N3839 NPN SILICON RF TRANSISTORS w w w. c e n t r a l s e m i . c o m DESCRIPTION: The CENTRAL SEMICONDUCTOR 2N2857 and 2N3839 are silicon NPN RF transistors designed for VHF/UHF amplifier, oscillator and converter applications. MARKING: FULL PART NUMBER TO-72 CASE MAXIMUM RATINGS: (TA=25°C unless otherwise noted) SYMBOL Collector-Base Voltage VCBO Collector-Emitter Voltage VCEO Emitter-Base Voltage VEBO Continuous Collector Current IC Power Dissipation PD Power Dissipation (TC=25°C) PD Operating and Storage Junction Temperature TJ, Tstg 30 15 2.5 40 200 300 -65 to +200 UNITS V V V mA mW mW °C ELECTRICAL CHARACTERISTICS: (TA=25°C unless otherwise noted) 2N2857 SYMBOL TEST CONDITIONS MIN MAX ICBO VCB=15V - 10 ICBO VCB=15V, TA=150°C - 1.0 BVCBO IC=1 [ ... ]