2N6122 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 25 to 100
• Transition Frequency, min: 3 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N6122 is the 2N6125.You can replace the 2N6122 with the 2N5496, 2N6130, 2N6131, 2N6473, 2N6474, 2N6487, 2N6487G, 2N6488, 2N6488G, 2SC2075, 2SD1274, 2SD1274A, 2SD1274B, 2SD362, 2SD823, BD707, BD709, BD711, BD743A, BD743B, BD743C, BD907, BD909, BD911, BDT91, BDT91F, BDT93, BDT93F, BDT95, BDT95F, KSD362, MJE2801T, MJE3055T, MJE3055TG, MJE5180, MJF3055, MJF3055G, TIP41D or TIP42D.