This part is a kind of semiconductor called 2SB1018.

Function of this product has SILICON POWER TRANSISTOR.

Manufacturers : SavantIC

Image and pinout :

Some of the text within the PDF file :

SavantIC Semiconductor Product Specification Silicon PNP Power Transistors 2SB1018 DESCRIPTION ·With TO-220Fa package ·Low saturation voltage ·Complement to type 2SD1411 APPLICATIONS ·High current switching applications ·Power amplifier applications PINNING PIN 1 2 3 Base Collector Emitter Fig.1 simplified outline (TO-220Fa) and symbol DESCRIPTION Absolute maximum ratings(Ta=25 ) SYMBOL VCBO VCEO VEBO IC IB PARAMETER Collector-base voltage Collector -emitter voltage Emitter-base voltage Collector current Base current Ta=25 PC Collector power dissipation TC=25 Tj Tstg Junction temperature Storage temperature 30 150 -55~150 CONDITIONS Open emitter Open base Open collector VALUE -100 -80 -5 -7 -1 2 W UNIT V V V A A SavantIC Semiconductor Pro [ ... ]

2SB1018 PDF Datasheet Download