mmbt3906ltg.pdf datasheet:

MMBT3906LTGGeneral Purpose TransistorsPackage outlineFeatures We declare that the material of product compliance with RoHSrequirements.3Ordering Information1Device Marking Shipping2MMBT3906LTG 2A 3000/Tape & ReelSOT23Maximum Ratings3Rating Symbol Value UnitCOLLECTORCollector-Emitter Voltage VCEO -40 Vdc1Collector-Base Voltage VCBO -40 VdcBASEEmitter-Base Voltage VEBO -5.0 Vdc2Collector Current - Continuous IC -200 mAdcEMITTERThermal CharacteristicsCharacteristic Symbol Max UnitTotal Device Dissipation FR- 5 Board PD@ T = 25C 225 mWADerate above 25C 1.8 mW/CThermal Resistance, Junction-to-Ambient RqJA 556 C/WTotal Device Dissipation Alumina PDSubstrate, @ TA = 25C 300 mWDerate above 25C 2.4 mW/CThermal Resistance, Junction-to-Ambient RqJA 417 C/WJunction and Storage Temperature TJ, Tstg -55 to