BD378-25 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -75 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 150 to 375
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The BD378-25 transistor can have a current gain of 150 to 375. The gain of the BD378 will be in the range from 40 to 375, for the BD378-10 it will be in the range from 63 to 160, for the BD378-16 it will be in the range from 100 to 250, for the BD378-6 it will be in the range from 40 to 100.The complementary NPN transistor to the BD378-25 is the BD377-25.The 2SB1115A (SOT-89) is the SMD version of the BD378-25 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD378-25 with the 2SB1167, 2SB1168, BD190, BD236, BD236G, BD238, BD238G, BD380, BD380-25, MJE235, MJE252 or MJE254.