MJ2801 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 115 W
• DC Current Gain (h_fe): 15 to 60
• Transition Frequency, min: 1 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 PNP transistor to the MJ2801 is the MJ2901.You can replace the MJ2801 with the 2N3771, 2N3771G, 2N3772, 2N3772G, 2N5301, 2N5302, 2N5302G, 2N5303, 2N5685, 2N5685G, 2N5686, 2N5686G, KD501, KD502, KD503, MJ14000, MJ14000G, MJ14002 or MJ14002G.