2N3738 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 225 V
• Collector-Base Voltage, max: 250 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 40 to 200
• Transition Frequency, min: 10 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-66

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N3738 is the 2N6424.You can replace the 2N3738 with the 2N3739.