View utc8550s datasheet:

UTC 8 5 5 0 S PNP EPITAXIAL SILICON TRANSISTOR LOW VOLTAGE HIGH CURRENT SMALL SIGNAL PNP TRANSISTOR FEATURES *Collector current up to 800mA *Collector-Emitter voltage up to 20 V *Complimentary to 8050S APPLICATIONS *Class B push-pull audio amplifier *General purpose applications TO-92 1:EMITTER 2: COLLECTOR 3: BASE ABSOLUTE MAXIMUM RATINGS ( Ta=25°C ,unless otherwise specified ) PARAMETERS SYMBOL RATING UNITS Collector-base voltage VCBO -30 V Collector-emitter voltage VCEO -20 V Emitter-base voltage VEBO -5 V Collector dissipation(Ta=25°C Pc 1 W Collector current Ic -800 mA Junction Temperature Tj 150 °C Storage Temperature TSTG -65 ~ +150 °C ELECTRICAL CHARACTERISTICS(Ta=25°C,unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Collector-ba