View 2sd2551 datasheet:

2SD2551 TOSHIBA TRANSISTOR SILICON NPN TRIPLE DIFFUSED MESA TYPE 2SD2551 HORIZONTAL DEFLECTION OUTPUT FOR COLOR TV Unit: mm High Voltage : VCBO = 1700 V Low Saturation Voltage : V = 5.0 V (Max.) CE (sat) High Speed : t = 1.0 µs (Max.) f Bult-in Damper Type Collector Metal (Fin) is Fully Covered with Mold Resin. MAXIMUM RATINGS (Tc = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Collector-Base Voltage VCBO 1700 V Collector-Emitter Voltage VCEO 600 V Emitter-Base Voltage VEBO 5 V DC IC 5 Collector Current A Pulse ICP 10 Base Current IB 2.5 A Collector Power Dissipation PC 50 W Junction Temperature Tj 150 °C JEDEC ? Storage Temperature Range Tstg -55~150 °C JEITA ? TOSHIBA 2-16E3A EQUIVALENT CIRCUIT Weight: 5.5 g (typ.) ELECTRICAL CHARACTERIS