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1 Motorola Small–Signal Transistors, FETs and Diodes Device Data General Purpose Transistors MAXIMUM RATINGS Value RatingSymbol BCX17LT1 BCX19LT1 BCX18LT1 BCX20LT1 Unit Collector–Emitter VoltageV CEO 4525Vdc Collector–Base VoltageV CBO 5030Vdc Emitter–Base VoltageV EBO 5.0Vdc Collector Current — ContinuousI C 500mAdc DEVICE MARKING BCX17LT1 = T1; BCX18LT1 = T2; BCX19LT1 = U1; BCX20LT1 = U2 THERMAL CHARACTERISTICS CharacteristicSymbolMaxUnit Total Device Dissipation FR-5 Board (1) T A = 25°C Derate above 25°C P D 225 1.8 mW mW/°C Thermal Resistance, Junction to AmbientR θJA 556°C/W Total Device Dissipation Alumina Substrate, (2) T A = 25°C Derate above 25°C P D 300 2.4 mW mW/°C Thermal Resistance, Junction to AmbientR θJA 417°C/W Junction and Storage TemperatureT J , T stg – 55 to +150°C 1. FR–5 = 1.0 x 0.75 x 0.062 in. 2.Alumina = 0.4 x 0.3 x 0.024 in. 99.5% alumina Thermal Clad is a trademark of the Bergquist Company Order this document by BCX17LT1/D MOTOROLA SEMICONDUCTOR TECHNICAL DATA PNP BCX17LT1 BCX18LT1 NPN BCX19LT1 BCX20LT1 1 2 3 CASE 318 – 08, STYLE 6 SOT– 23 (TO – 236AB) Voltage and current are negative for PNP transistors Motorola, Inc. 1996 COLLECTOR 3 1 BASE 2 EMITTER COLLECTOR 3 1 BASE 2 EMITTER