mmbta55-mmbta56.pdf datasheet:

MMBTA55 / MMBTA56 PNP Silicon Elektronische BauelementeDriver Transistor RoHS Compliant ProductA suffix of "-C" specifies halogen & lead-freeSOT-23SOT-233Dim Min Max1 AA 2.800 3.040L2B 1.200 1.4003C 0.890 1.110SCOLLECTOR Top ViewBD 0.370 0.5001 23G 1.780 2.040V G H 0.013 0.1001J 0.085 0.177BASEC K 0.450 0.600L 0.890 1.0202HJDE MITTE R KS 2.100 2.500V 0.450 0.600All Dimension in mm MAXIMUM RATINGS RATING SYMBOL VALUE UNITMMBTA55 -60 Collector - Emitter Voltage VCEO VMMBTA56 -80MMBTA55 -60 Collector - Base Voltage VCBO VMMBTA56 -80Emitter - Base Voltage VEBO -4.0 VCollector Current - Continuous IC -500 mAMarking Code: MMBTA55:2H , MMBTA56:2GM THERMAL CHARACTERISTICS CHARACTERISTIC SYMBOL MAX. UNITTotal Device Dissipation FR-5 Board(1) TA = 25 225 mWPDDerate Above 25 1.8 mW / Th