mmbta56.pdf datasheet:

SMD Type TransistorsPNP TransistorsMMBTA56 (KMBTA56)SOT-23Unit: mm+0.12.9 -0.10.4+0.1-0.13 Features Collector Current Capability IC=-0.5A Collector Emitter Voltage VCEO=-80V1 2COLLECTOR+0.1+0.053 0.95 -0.1 0.1-0.01+0.11.9 -0.111.BaseBASE2.Emitter3.collector2EMITTER Absolute Maximum Ratings Ta = 25Parameter Symbol Rating Unit Collector - Base Voltage VCBO -80 Collector - Emitter Voltage VCEO -80 V Emitter - Base Voltage VEBO -4 Collector Current - Continuous IC -0.5 A Collector Power Dissipation PC 225 mW Derate Above 25C 1.8 mW/ Thermal Resistance Junction-to-Ambient RJA 556 /W Junction Temperature TJ 150 Storage Temperature range Tstg -55 to 150 Electrical Characteristics Ta = 25Parameter Symbol Test Conditions Min Typ Max Unit Collector- base breakdown voltage VCBO I