This part is a kind of semiconductor called BDT63B.

Function of this product has Silicon NPN Darlington Power Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Product Specification isc Silicon NPN Darlington Power Transistor DESCRIPTION ·Collector Current -IC= 10A ·High DC Current Gain-hFE= 1000(Min)@ IC= 3A ·Complement to Type BDT62/A/B/C APPLICATIONS ·Designed for audio output stages and general purpose amplifier applications ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER BDT63 Collector-Emitter Voltage BDT63A BDT63B BDT63C BDT63 Collector-Emitter Voltage BDT63A BDT63B BDT63C VEBO IC ICM IB B BDT63/A/B/C VALUE 60 80 UNIT VCER V 100 120 60 80 V 100 120 5 10 15 0.25 90 150 -65~150 V A A A W ℃ ℃ www.DataSheet.net/ VCEO Emitter-Base Voltage Collector Current-Continuous Collector Current-Peak Base Current-Continuous Collector Power Dissipation @ TC=25℃ Junction Temperature Storage Temperature Range [ ... ]

BDT63B PDF Datasheet Download