This part is a kind of semiconductor called 2N3980.

Function of this product has PN UNIJUNCTION TRANSISTOR.

Manufacturers : Digitron Semiconductors

Image and pinout :

Some of the text within the PDF file :

2N3980 High-reliability discrete products and engineering services since 1977 PN UNIJUNCTION TRANSISTOR 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 RMS power dissipation (1) RMS emitter current Peak pulse emitter current (2) Emitter reverse voltage Interbase voltage Storage temperature range Symbol PD Ie ie VB2E VB2B1 Tstg Value 360 60 1 30 35 -65 to 200 Unit mW mA Amp Volts Volts °C ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified) Characteristic Symbol Min Typ Max Unit Intrinsic standoff ratio VB2B1 = 10V (1) ŋ 0.68 - 0.82 - Interbase resistance V [ ... ]

2N3980 PDF Datasheet Download