2N6129 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 7 A
• Collector Dissipation: 50 W
• DC Current Gain (h_fe): 20 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 2N6129 is the 2N6132.You can replace the 2N6129 with the 2N5490, 2N5492, 2N5494, 2N5496, 2N6130, 2N6131, 2N6486, 2N6486G, 2N6487, 2N6487G, 2N6488, 2N6488G, BD705, BD707, BD709, BD743, BD743A, BD743B, BD905, BD907, BD909, BDT91, BDT91F, BDT93, BDT93F, MJE3055T or MJE3055TG.