This part is a kind of semiconductor called BD951F.

Function of this product has Silicon NPN Power Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specification BD949F/951F/953F/955F DESCRIPTION ·DC Current Gain- : hFE= 40(Min)@ IC= 500mA ·Complement to Type BD950F/952F/954F/956F APPLICATIONS ·Designed for power amplifier and switching applications ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT BD949F 60 VCBO Collector-Base Voltage BD951F BD953F 80 100 V BD955F 120 BD949F 60 VCEO BD951F Collector-Emitter Voltage BD953F 80 100 V BD955F 120 VEBO Emitter-Base Voltage 5V IC Collector Current-Continuous 5A ICM Collector Current-Peak PC Collector Power Dissipation @ TC=25℃ TJ Junction Temperature Tstg Storage Temperature Range 8 22 150 -65~150 A W ℃ ℃ THERMAL CHARACTERISTICS SYMBOL PARAMETER Rth j-c Thermal R [ ... ]

BD951F PDF Datasheet Download