2N4901 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -5 A
• Collector Dissipation: 87.5 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.The complementary NPN transistor to the 2N4901 is the 2N5067.You can replace the 2N4901 with the 2N4902, 2N4903, 2N4907, 2N4908, 2N4909, 2N5867, 2N5868, 2N5871, 2N5872, 2N5875, 2N5876, 2N5879, 2N5880, 2N5883, 2N5883G, 2N5884, 2N5884G, 2N6246, 2N6247, 2N6317, 2N6318, 2N6436, 2N6469, BDW52, MJ14001, MJ14001G, MJ14003, MJ14003G, MJ2940 or MJ2941.