View utc m28s datasheet:

UTC M28S NPN EPITAXIAL SILICON TRANSISTOR AUDIO OUTPUT DRIVER AMPLIFIER FEATURES *Excellent HFE linearity *High DC Current Gain *High Power Dissipation APPLICATION *Audio output driver amplifier *General purpose switch 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 40 V Collector-emitter voltage VCEO 20 V Emitter-base voltage VEBO 6 V Collector dissipation(Ta=25°C Pc 850 mW Collector current Ic 1.25 A Base current IB 0.4 A Junction Temperature Tj 150 °C Storage Temperature TSTG -55 ~ +150 °C ELECTRICAL CHARACTERISTICS(Ta=25°C,unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Collector-base voltage VCBO Ic=0.1mA 40 V Collector-e