TOSHIBA Transistor Silicon NPN Triple Diffused Mesa Type 2SD2638 Horizontal Deflection Output for Color TV, Digital TV. High Speed Switching Applications. 2SD2638 Unit: mm High voltage: VCBO = 1700 V Low saturation voltage: VCE (sat) = 5 V (max) High speed: tf = 0.8 µs (max) Maximum Ratings (Tc = 25°C) Characteristics Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current DC Pulse Base current Collector power dissipation Junction tem.