This part is a kind of semiconductor called 2SD2500.

Function of this product has SILICON NPN TRIPLE DIFFUSED MESA TYPE TRANSISTOR.

Manufacturers : Toshiba Semiconductor

Image and pinout :

Some of the text within the PDF file :

2SD2500 TOSHIBA TRANSISTOR SILICON NPN TRIPLE DIFFUSED MESA TYPE 2SD2500 HORIZONTAL DEFLECTION OUTPUT COLOR TV Unit: mm l High Voltage : VCBO = 1500 V l Low Saturation Voltage : VCE (sat) = 3 V (Max.) l High Speed : tf = 0.35µs (Typ.) l Collector Metal (Fin) is Fully Covered with Mold Resin. MAXIMUM RATINGS (Tc = 25°C) CHARACTERISTIC Collector−Base Voltage Collector−Emitter Voltage Emitter−Base Voltage Collector Current DC Pulse Base−Current Collector Power Dissipation Junction Temperature Storage Temperature Range SYMBOL VCBO VCEO VEBO IC ICP IB PC Tj Tstg RATING 1500 600 5 10 20 5 50 150 −55~150 ELECTRICAL CHARACTERISTICS (Tc = 25°C) UNIT V V V A A W °C °C JEDEC ― JEITA ― TOSHIBA 2-16E3A Weight: 5.5 g (typ.) CHARACTERISTIC SYMBOL TEST C [ ... ]

2SD2500 PDF Datasheet Download