BD745B Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 20 A
• Collector Dissipation: 115 W
• DC Current Gain (h_fe): 20 to 150
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-3P

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BD745B is the BD746B.You can replace the BD745B with the BD745C or TIP35CA.