mmbta56wt1g.pdf datasheet:

MMBTA56W, SMMBTA56WDriver TransistorPNP SiliconFeatures Moisture Sensitivity Level: 1http://onsemi.com ESD Rating: Human Body Model - 4 kV Machine Model - 400 V S Prefix for Automotive and Other Applications Requiring UniqueSite and Control Change Requirements; AEC-Q101 Qualified andPPAP Capable SC-70 (SOT-323)CASE 419 These Devices are Pb-Free, Halogen Free/BFR Free and are RoHSSTYLE 3Compliant*COLLECTOR3MAXIMUM RATINGSRating Symbol Value Unit1Collector-Emitter Voltage VCEO -80 VdcBASECollector-Base Voltage VCBO -80 Vdc2Emitter-Base Voltage VEBO -4.0 VdcEMITTERCollector Current - Continuous IC -500 mAdcMARKING DIAGRAMTHERMAL CHARACTERISTICSCharacteristic Symbol Max UnitTotal Device Dissipation FR-5 Board PD mWFM M GTA = 25C 150GThermal Resistance, Junction to Ambient RqJA 833 C/W1Junction