View tip31 datasheet:

TIP31A/31B/31C TIP32A/32B/32C COMPLEMENTARY SILICON POWER TRANSISTORS n TIP31A, TIP31C, TIP32A,TIP32B, AND TIP32C ARE SGS-THOMSON PREFERRED SALESTYPES DESCRIPTION The TIP31A, TIP31B and TIP31C are silicon epitaxial-base NPN power transistors in Jedec TO-220 plastic package, intented for use in medium power linear and switching applications. 3 2 The complementary PNP types are TIP32A, 1 TIP32B and TIP32C. TO-220 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit NPN TIP31A TIP31B TIP31C PNP TIP32A TIP32B TIP32C V Collector-Base Voltage (I = 0) 60 80 100 V CBO E V Collector-Emitter Voltage (I = 0) 60 80 100 V CEO B VEBO Emitter-Base Voltage (IC = 0) 5 V IC Collector Current 3 A I Collector Peak Current 5 A CM I Base Current 1 A B