This part is a kind of semiconductor called 2SB1568.
Function of this product has Power Transistor ( 80V/4A).
Manufacturers : Rohm
Image and pinout :
Some of the text within the PDF file :
2SB1568 Transistors Power Transistor (−80V, −4A) 2SB1568 z Features 1) Available in TO-220 FN package 2) Darling connection provides high dc current gain (hFE) 3) Damper diode is incorporated 4) Built in resistors between base and emitter 5) Two millimeters lower than TO-220 FP which allows higher density mounting 6) Complementary pair with 2SD2399 zExternal dimensions (Unit : mm) 10.0 φ3.2 4.5 2.8 5.0 1.2 1.3 0.8 ROHM : TO-220FN zApplications Power amplifler zAbsolute maximum rating (Ta=25°C) Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Symbol VCBO VCEO VEBO IC ICP PC Collector dissipation Junction temperature Storage temperature zElectrical characteristics (unless otherwise noted, Ta=25°C) Parameter Collector−base b [ ... ]