This part is a kind of semiconductor called 2SJ6812.

Function of this product has NPN Triple Diffused Planar Silicon Transistor.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

FJAF6812 FJAF6812 High Voltage Color Display Horizontal Deflection Output • High Collector-Base Breakdown Voltage : BVCBO = 1500V • High Switching Speed : tF(typ.) =0.1µs • For Color Monitor TO-3PF 1 1.Base 2.Collector 3.Emitter NPN Triple Diffused Planar Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCBO VCEO VEBO IC ICP* PC TJ TSTG Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current (DC) Collector Current (Pulse) Collector Dissipation Junction Temperature Storage Temperature Rating 1500 750 6 12 24 60 150 -55 ~ 150 Units V V V A A W °C °C * Pulse Test: PW=300µs, duty Cycle=2% Pulsed Electrical Characteristics TC=25°C unless otherwise noted Symbol ICES ICBO IEBO BVEBO hFE [ ... ]

2SJ6812 PDF Datasheet Download