BD178-6 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -60 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 BD178-6 transistor can have a current gain of 40 to 60. The gain of the BD178 will be in the range from 40 to 250, for the BD178-10 it will be in the range from 63 to 160.The complementary NPN transistor to the BD178-6 is the BD177-6.You can replace the BD178-6 with the 2N4919, 2N4919G, 2N4920, 2N4920G, 2N5194, 2N5194G, 2N5195, 2N5195G, BD180, BD180-6, BD180G, BD190, BD440, BD440G, BD442, BD442G, BD788, BD788G, BD790, BD792, MJE233, MJE234, MJE235, MJE250, MJE251, MJE252, MJE253, MJE253G, MJE254 or NTE185.