This part is a kind of semiconductor called B1109.

Function of this product has 2SB1109.

Manufacturers : Hitachi Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SB1109, 2SB1110 Silicon PNP Epitaxial Application Low frequency high voltage amplifier complementary pair with 2SD1609 and 2SD1610 Outline TO-126 MOD 123 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 Symbol VCBO VCEO VEBO IC PC Tj Tstg 1. Emitter 2. Collector 3. Base Ratings 2SB1109 –160 –160 –5 –100 1.25 150 –45 to +150 2SB1110 –200 –200 –5 –100 1.25 150 –45 to +150 Unit V V V mA W °C °C 2SB1109, 2SB1110 Electrical Characteristics (Ta = 25°C) 2SB1109 2SB1110 Item Symbol Min Typ Max Min Typ Max Unit Test conditions Collector to base breakdown voltage V(BR)CBO –160 –200 [ ... ]

B1109 PDF Datasheet Download