mmbta55lt1 mmbta56lt1.pdf datasheet:

MMBTA55LT1G,MMBTA56LT1GDriver TransistorsPNP Siliconhttp://onsemi.comFeatures These Devices are Pb-Free, Halogen Free/BFR Free and are RoHSCOLLECTORCompliant31BASEMAXIMUM RATINGS2EMITTERRating Symbol Value UnitCollector-Emitter Voltage VCEO VdcMMBTA55 -603MMBTA56 -80Collector-Base Voltage VCBO VdcMMBTA55 -60 1MMBTA56 -802Emitter-Base Voltage VEBO -4.0 VdcSOT-23CASE 318Collector Current - Continuous IC -500 mAdcSTYLE 6THERMAL CHARACTERISTICSCharacteristic Symbol Max UnitMARKING DIAGRAMTotal Device Dissipation FR- 5 Board PD(Note 1) TA = 25C 225 mWDerate above 25C 1.8 mW/C2xx M GThermal Resistance, Junction-to-Ambient RqJA 556 C/WGTotal Device Dissipation Alumina PD 1Substrate, (Note 2) TA = 25C 300 mWDerate above 25C 2.4 mW/C2xx = Device Codex = H for MMBTA55LT1Thermal Resistance, Jun