View bcx17lt1 datasheet:

MOTOROLA Order this document SEMICONDUCTOR TECHNICAL DATA by BCX17LT1/D COLLECTOR 3 PNP General Purpose 1 BCX17LT1 BASE Transistors BCX18LT1 2 EMITTER NPN COLLECTOR 3 BCX19LT1 BCX20LT1 1 BASE Voltage and current are negative for PNP transistors 2 EMITTER 3 MAXIMUM RATINGS 1 Value 2 BCX17LT1 BCX18LT1 CASE 318–08, STYLE 6 Rating Symbol BCX19LT1 BCX20LT1 Unit SOT–23 (TO–236AB) Collector–Emitter Voltage VCEO 45 25 Vdc Collector–Base Voltage VCBO 50 30 Vdc Emitter–Base Voltage VEBO 5.0 Vdc Collector Current — Continuous IC 500 mAdc DEVICE MARKING BCX17LT1 = T1; BCX18LT1 = T2; BCX19LT1 = U1; BCX20LT1 = U2 THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Total Device Dissipation FR-5 Board (1) PD 225 mW TA = 25°C Derate above 25°C 1.8 mW/°C Thermal