View bc490 datasheet:

BC490High Current TransistorsPNP SiliconFeatures This is a Pb-Free Device*http://onsemi.comCOLLECTOR1MAXIMUM RATINGSRating Symbol Value Unit2Collector - Emitter Voltage VCEO -80 VdcBASECollector - Base Voltage VCBO -80 Vdc3Emitter - Base Voltage VEBO -4.0 VdcEMITTERCollector Current - Continuous IC -1.0 AdcTotal Device Dissipation @ TA = 25C PD 625 mWDerate above 25C 5.0 mW/CTotal Device Dissipation @ TC = 25C PD 1.5 WDerate above 25C 12 mW/CTO-92Operating and Storage Junction TJ, Tstg -55 to +150 CCASE 29Temperature RangeSTYLE 17THERMAL CHARACTERISTICS12Characteristic Symbol Max Unit3STRAIGHT LEADThermal Resistance, Junction-to-Ambient RqJA 200 C/WBULK PACKThermal Resistance, Junction-to-Case RqJC 83.3 C/WStresses exceeding Maximum Ratings may damage the device. MaximumRatings are stress ra

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