This part is a kind of semiconductor called k246.
Function of this product has N-CHANNEL JUNCTION TYPE Field Effect Transistor.
Manufacturers : Toshiba
Image and pinout :

Some of the text within the PDF file :
TOSHIBA Field Effect Transistor Silicon N Channel Junction Type 2SK246 For Constant Current, Impedance Converter and DC-AC High Input Impedance Amplifier Circuit Applications 2SK246 Unit: mm · High breakdown voltage: VGDS = −50 V · High input impedance: IGSS = −1 nA (max) (VGS = −30 V) Maximum Ratings (Ta = 25°C) Characteristics Gate-drain voltage Gate current Drain power dissipation Junction temperature Storage temperature range Symbol VGDS IG PD Tj Tstg Rating -50 10 300 125 -55~125 Unit V mA mW °C °C Electrical Characteristics (Ta = 25°C) JEDEC TO-92 JEITA SC-43 TOSHIBA 2-5F1C Weight: 0.21 g (typ.) Characteristics Symbol Test Condition Gate cut-off current Gate-drain breakdown voltage Drain current Gate-source cut-off voltage Forward transfer admittance In [ ... ]
k246 PDF Datasheet Download
