BD743 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 90 W
• DC Current Gain (h_fe): 20 to 150
• 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 BD743 is the BD744.You can replace the BD743 with the 2N6487, 2N6487G, 2N6488, 2N6488G, BD743A, BD743B, BD905, BD907 or BD909.