BD378-10 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): 63 to 160
• 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 BD378-10 transistor can have a current gain of 63 to 160. The gain of the BD378 will be in the range from 40 to 375, for the BD378-16 it will be in the range from 100 to 250, for the BD378-25 it will be in the range from 150 to 375, for the BD378-6 it will be in the range from 40 to 100.The complementary NPN transistor to the BD378-10 is the BD377-10.The FMMT551 (SOT-23) and KTA1668 (SOT-89) is the SMD version of the BD378-10 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD378-10 with the 2SB744A, BD178, BD178-10, BD180, BD180-10, BD180G, BD190, BD236, BD236G, BD238, BD238G, BD380, BD380-10, BD788, BD788G, BD790, BD792, KSB744A, KSE171, KSE172, MJE171, MJE171G, MJE172, MJE172G, MJE233, MJE235, MJE250, MJE251, MJE252, MJE253, MJE253G or MJE254.