BDT31A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 100 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 complementary PNP transistor to the BDT31A is the BDT32A.You can replace the BDT31A with the BDT31B, BDT31C, MJF31C, MJF31CG, TIP31A, TIP31AG, TIP31B, TIP31BG, TIP31C, TIP31CF, TIP31CG, TIP31D or TIP31E.