View mpsa42 utc datasheet:

UTC MPSA42/43 NPN EPITAXIAL SILICON TRANSISTOR HIGH VOLTAGE TRANSISTOR DESCRIPTION The UTC MPSA42/43 are high voltage transistors, designed for telephone switch and high voltage switch. FEATURES *Collector-Emitter voltage: 1 VCEO=300V(UTC MPSA42) VCEO=200V(UTC MPSA43) *High current gain *Complement to UTC MPSA92/93 TO-92 *Collector Dissipation: Pc(max)=625mW 1:EMITTER 2:BASE 3:COLLECTOR ABSOLUTE MAXIMUM RATINGS ( Operating temperature range applies unless otherwise specified ) PARAMETER SYMBOL VALUE UNIT Collector-Base Voltage V UTC MPSA42 VCBO 300 UTC MPSA43 200 Collector-Emitter Voltage V UTC MPSA42 VCEO 300 UTC MPSA43 200 Emitter-Base Voltage VEBO 6 V Collector Dissipation Pc 625 mW Collector Current Ic 500 mA Junction Temperature Tj 150 °C Storage T