gstmmbt2222a.pdf datasheet:

GSTMMBT2222A NPN General Purpose Transistors Product Description Features This device is designed as a general purpose Lead(Pb)-Freeamplifier and switch. Packages & Pin Assignments GSTMMBT2222AF(SOT-23) Pin Description1 Base 2 Emitter 3 Collector Marking Information P/N Package Part Marking GSTMMBT2222AF SOT-23 1POrdering Information GS P/NGSTMMBT2222A FPb Free CodePart Number Package Quantity GSTMMBT2222AF SOT-23 3000 PCSwww.gs-power.com1GSTMMBT2222AAbsolute Maximum Ratings TA=25C Symbol Conditions Typical UnitVCEO Collector-Emitter Voltage 40 VVCBO Collector-Base Voltage 75 VVEBO Emitter-Base Voltage 6.0 VIC(DC) Collector Current (DC) 600 mA Total Device Dissipation FR-5 Board (1)TA=25C 225 mWPD Derate above 25C 1.8 mW/CRJA Thermal Resistance Junction to Ambient 556 C/W Total Device Dissipation Alumina