This part is a kind of semiconductor called B1015A.

Function of this product has 2SB1015A.

Manufacturers : Toshiba Semiconductor

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Some of the text within the PDF file :

TOSHIBA Transistor Silicon PNP Triple Diffused Type 2SB1015A 2SB1015A Audio Frequency Power Amplifier Applications · Low collector saturation voltage: VCE (sat) = −1.7 V (max) (IC = −3 A, IB = −0.3 A) · Collector power dissipation: PC = 25 W (Tc = 25°C) Maximum Ratings (Ta = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Base current Collector power dissipation Ta = 25°C Tc = 25°C Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IC IB PC Tj Tstg Rating -60 -60 -7 -3 -0.5 2.0 25 150 -55~150 Unit V V V A A W °C °C Unit: mm JEDEC ― JEITA SC-67 TOSHIBA 2-10R1A Weight: 1.7 g (typ.) 1 2003-02-04 2SB1015A Electrical Characteristics (Ta = 25°C) Characteristics Collector [ ... ]

B1015A PDF Datasheet Download