pzta92t1.pdf datasheet:

PZTA92T1High Voltage TransistorPNP SiliconFeatures These Devices are Pb-Free, Halogen Free/BFR Free and are RoHShttp://onsemi.comCompliantSOT-223 PACKAGEMAXIMUM RATINGS (TC = 25C unless otherwise noted)PNP SILICONRating Symbol Value UnitHIGH VOLTAGE TRANSISTORCollector-Emitter Voltage VCEO -300 VdcSURFACE MOUNTCollector-Base Voltage VCBO -300 VdcEmitter-Base Voltage VEBO -5.0 Vdc COLLECTOR 2,4Collector Current IC -500 mAdcBASETotal Power Dissipation PD 1.51up to @ TA = 25C (Note 1) WStorage Temperature Range Tstg -65 to 150 CEMITTER 3Junction Temperature TJ 150 CTHERMAL CHARACTERISTICSMARKING4Characteristic Symbol Max UnitDIAGRAM1Thermal Resistance, RqJA 83.3 C/W 23Junction-to-Ambient (Note 1)SOT-223Stresses exceeding Maximum Ratings may damage the device. Maximum AYWP2DGRatings are stress ratings onl