2sc2073.pdf datasheet:

2SC2073(NPN) TO-220 TransistorTO-2201. BASE 2. COLLECTOR 3. EMITTER 3 21Features Wide safe Operating Area. Complementary to 2SA940 MAXIMUM RATINGS (TA=25 unless otherwise noted) Dimensions in inches and (millimeters)Symbol Paramenter Value UnitsVCBO Collector-Base Voltage 150 V VCEO Collector-Emitter Voltage 150 V VEBO Emitter-Base Voltage 5 V IC Collector Current -Continuous 1.5 A PC Collector Power Dissipation 1.5 W Tj Junction Temperature 150 Tstg Storage Temperature -55-150 ELECTRICAL CHARACTERISTICS (Tamb=25 unless otherwise specified) Parameter Symbol Test conditions MIN TYP MAX UNITCollector-base breakdown voltage V(BR)CBO IC =100A, IE=0 150 VCollector-emitter breakdown voltage V(BR)CEO IC =1mA, IB=0 150 VEmitter-base breakdown voltage V(BR)EBO IE=100A, IC=0 5 VCollector cut-off current ICBO VCB=1