BD178 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 250
• 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 transistor can have a current gain of 40 to 250. The gain of the BD178-10 will be in the range from 63 to 160, for the BD178-6 it will be in the range from 40 to 60.The complementary NPN transistor to the BD178 is the BD177.You can replace the BD178 with the BD180, BD180G, BD190, BD788, BD788G, BD790, BD792, MJE235, MJE252 or MJE254.