This part is a kind of semiconductor called 2SD818.

Function of this product has Silicon NPN Power Transistor.

Manufacturers : INCHANGE

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specification 2SD818 DESCRIPTION ·High Collector-Base Breakdown Voltage- : V(BR)CBO= 1500V (Min.) ·Low Collector Saturation Voltage·High Switching Speed APPLICATIONS ·Designed for color TV horizontal output applications. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) i.cnSYMBOL PARAMETER MAX UNIT .iscsemVCBO Collector-Base Voltage 1500 V wwwVCEO Collector-Emitter Voltage 600 V VEBO Emitter-Base Voltage 5V IC Collector Current-Continuous 2.5 A IE Emitter Current-Continuous PC Collector Power Dissipation @TC=25℃ Tj Junction Temperature -2.5 A 50 W 150 ℃ Tstg Storage Temperature Range -65~150 ℃ isc Website：www.iscsemi.cn INCHANGE Semiconductor isc Silicon NPN Power Transistor isc Product Specific [ ... ]

2SD818 PDF Datasheet Download