This part is a kind of semiconductor called C1906.

Function of this product has 2SC1906.

Manufacturers : Hitachi Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SC1906 Silicon NPN Epitaxial Planar Application • VHF amplifier • Mixer, Local oscillator Outline TO-92 (2) 3 2 1 1. Emitter 2. Collector 3. Base 2SC1906 Absolute Maximum Ratings (Ta = 25°C) Item Collector to base voltage Collector to emitter voltage Emitter to base voltage Collector current Emitter current Collector power dissipation Junction temperature Storage temperature Symbol VCBO VCEO VEBO IC IE PC Tj Tstg Ratings 30 19 2 50 –50 300 150 –55 to +150 Unit V V V mA mA mW °C °C Electrical Characteristics (Ta = 25°C) Item Symbol Min Collector to base breakdown voltage V(BR)CBO 30 Collector to emitter breakdown V(BR)CEO voltage 19 Emitter to base breakdown voltage V(BR)EBO 2 Collector cutoff current DC current transfer ratio Gain bandwidth product Collect [ ... ]

C1906 PDF Datasheet Download