This part is a kind of semiconductor called D1546.

Function of this product has 2SD1546.

Manufacturers : Wing Shing Computer

Image and pinout :

Some of the text within the PDF file :

2SD1546 NPN TRIPLE DIFFUSED PLANAR SILICON TRANSISTOR COLOR TV HORIZONTAL OUTPUT APPLICATIONS(NO Damper Diode) 2-16E3A ! ! High Collector-Base Voltage(VCBO=1500V) High Speed Switching ABSOLUTE MAXIMUM RATINGS (Ta=25 ) Characteristic Collector-Base Voltage Collector-Emitter Voltage Emitter-Base voltage Collector Current (DC) Collector Dissipation (Tc=25 ) Junction Temperature Storage Temperature Symbol VCBO VCEO VEBO IC PC Tj Tstg Rating 1500 600 6 6 50 150 -50~150 Unit V V V A W ELECTRICAL CHARACTERISTICS (Ta=25 ) Characteristic Collector- Emitter Cutoff Current(VBE=0) Collector Cutoff Current Emitter Cutoff Current DC Current Gain Collector- Emitter Saturation Voltage Symbol ICES ICBO IEBO hFE VCE(sat) Test Condition VCE= 1400 V ,RBE=0 VCB= 800 V , IE=0 [ ... ]

D1546 PDF Datasheet Download