tip122-tip127 to220.pdf datasheet:

TIP120,121,122SEMICONDUCTORTECHNICAL DATATIP125,126,127 TIP120,121,122 Darlington TRANSISTOR (NPN)TO-220 TIP125,126,127 Darlington TRANSISTOR (PNP) 1.BASE 2.COLLECTOR FEATURESMedium Power Complementary silicon transistors 3.EMITTER MAXIMUM RATINGS (TA=25 unless otherwise noted) Symbol Parameter TIP120 TIP121 TIP122 Units TIP125 TIP126 TIP127 VCBO Collector-Base Voltage 60 80 100 V VCEO Collector-Emitter Voltage 60 80 100 V VEBO Emitter-Base Voltage 5 V IC Collector Current -Continuous 5 A PC Collector Power Dissipation 2 W RJA Thermal Resistance Junction to Ambient 62.5 /W RJc Thermal Resistance Junction to Case 1.92 /W TJ Junction Temperature 150 Tstg Storage Temperature -55to+150 ELECTRICAL CHARACTERISTICS (Tamb=25 unless otherwise specified) Parameter Symbol Test conditions MIN MAX UNIT Collector-base breakdo