This part is a kind of semiconductor called 2N3866.

Function of this product has RF & MICROWAVE DISCRETE LOW POWER TRANSISTORS.

Manufacturers : Microsemi Corporation

Image and pinout :

Some of the text within the PDF file :

140 COMMERCE DRIVE MONTGOMERYVILLE, PA 18936-1013 PHONE: (215) 631-9840 FAX: (215) 631-9855 2N3866 / 2N3866A RF & MICROWAVE DISCRETE LOW POWER TRANSISTORS Features • • Silicon NPN, To-39 packaged VHF/UHF Transistor Specified 400 MHz, 28Vdc Characteristics - Output Power = 1.0 Watt - Minimum Gain = 10 dB - Efficiency = 45% 800 MHz Current-Gain Bandwidth Product • 1. Emitter 2. Base 3. Collector TO-39 DESCRIPTION: Silicon NPN transistor, designed for VHF and UHF equipment. Applications include amplifier; pre-driver, driver, and output stages. Also suitable for oscillator and frequency-multiplier functions. ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C) Symbol VCEO VCBO VEBO IC Parameter Collector-Emitter Collector-Base Voltage Emitter-Base Voltage Collector Current Value 30 55 3.5 400 [ ... ]

2N3866 PDF Datasheet Download