This part is a kind of semiconductor called C4046.

Function of this product has 2SC4046.

Manufacturers : Hitachi Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SC4046 Silicon NPN Epitaxial Application High voltage amplifier Outline TO-126 MOD 123 1. Emitter 2. Collector 3. Base Absolute Maximum Ratings (Ta = 25°C) Item Collector to base voltage Collector to emitter voltage Emitter to base voltage Collector current Collector power dissipation Junction temperature Storage temperature Note: 1. Value at TC = 25°C Symbol VCBO VCEO VEBO IC PC * 1 Tj Tstg Ratings 120 120 5 0.2 8 150 –55 to +150 Unit V V V A W °C °C 2SC4046 Electrical Characteristics (Ta = 25°C) Item Symbol Min Typ Collector to base breakdown voltage V(BR)CBO 120 Collector to emitter breakdown V(BR)CEO voltage 120 Emitter to base breakdown voltage V(BR)EBO 5 Collector cutoff current ICBO DC current transfer ratio hFE*1 250 Base [ ... ]

C4046 PDF Datasheet Download