tip31c.pdf datasheet:

SEMICONDUCTOR TIP31CTECHNICAL DATA TRIPLE DIFFUSED NPN TRANSISTORGENERAL PURPOSE APPLICATION.ARFEATURES S Complementary to TIP32C.PDDIM MILLIMETERSA 10.30 MAXB 15.30 MAXC 0.80MAXIMUM RATING (Ta=25 ) _+D 3.60 0.20TE 3.00CHARACTERISTIC SYMBOL RATING UNIT F 6.70 MAX_G 13.60 + 0.50LH 5.60 MAXVCBOCollector-Base Voltage 100 VC CJ 1.37 MAXK 0.50VCEOCollector-Emitter Voltage 100 VL 1.50 MAXM MM 2.54VEBOEmitter-Base Voltage 5 VKN 4.70 MAXO 2.601 2 3ICDC 3P 1.50 MAXCollector Current AJQ 1.50ICPPulse 5_1. BASE R 9.50 + 0.20_S 8.00 + 0.202. COLLECTOR (HEAT SINK)IBBase Current 1 A T 2.90 MAX3. EMITTER2 WTa=25 Collector Power PCDissipation40 WTc=25 TO-220ABTjJunction Temperature 150 Tstg -55 150 Storage Temperature RangeELECTRICAL CHARACTERISTICS (Ta=25 )CHAR