BD179-6 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 40 to 60
• Transition Frequency, min: 3 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The BD179-6 transistor can have a current gain of 40 to 60. The gain of the BD179 will be in the range from 40 to 250, for the BD179-10 it will be in the range from 63 to 160.The complementary PNP transistor to the BD179-6 is the BD180-6.The BDP951 (SOT-223) is the SMD version of the BD179-6 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD179-6 with the 2N4923, 2N4923G, 2N5192, 2N5192G, BD441, BD441G, BD789, BD791, MJE240, MJE241, MJE242, MJE243, MJE243G, MJE244 or NTE184.