This part is a kind of semiconductor called 3N201.

Function of this product has DUAL GATE MOSFET VHF AMPLIFIER.

Manufacturers : Digitron Semiconductors

Image and pinout :

Some of the text within the PDF file :

3N201-3N203 High-reliability discrete products and engineering services since 1977 DUAL GATE MOSFET VHF AMPLIFIER FEATURES  Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number.  Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix. MAXIMUM RATINGS Rating Drain-source voltage Drain-gate voltage Drain current Gate current Total device dissipation @ TA = 25°C Derate above 25°C Total device dissipation @ TC = 25°C Derate above 25°C Lead temperature Junction temperature range Storage temperature range Symbol VDS VDG1 VDG2 ID IG1 IG2 PD PD TL TJ Tstg Value 25 30 50 ±10 360 2.4 1.2 8.0 300 -65 to 175 -65 to 175 Unit Vdc Vdc mAdc mAdc mW mW/°C W mW/°C °C °C °C ELECTRICA [ ... ]

3N201 PDF Datasheet Download