TIP31B Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 10 to 50
• Transition Frequency, min: 3 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The TIP31B transistor is marked as "TIP31B".The complementary PNP transistor to the TIP31B is the TIP32B.You can replace the TIP31B with the BDT31B, BDT31C, MJF31C, MJF31CG, TIP31BG, TIP31C, TIP31CF, TIP31CG, TIP31D, TIP31E or TIP31F.The TIP31BG transistor is the lead-free version of the TIP31B.