2N4909 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -7 V
• Collector Current − Continuous, max: -10 A
• Collector Dissipation: 150 W
• DC Current Gain (h_fe): 20 to 80
• Transition Frequency, min: 4 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.You can replace the 2N4909 with the 2N5876, 2N5880, 2N5884, 2N5884G, 2N6030, 2N6230, 2N6247, 2N6248, 2N6436, 2N6437, 2N6438, MJ14003, MJ14003G or MJ2941.