BD140 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -100 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1.5 A
• Collector Dissipation: 12.5 W
• DC Current Gain (h_fe): 40 to 250
• 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 BD140 transistor can have a current gain of 40 to 250. The gain of the BD140-10 will be in the range from 63 to 160, for the BD140-16 it will be in the range from 100 to 250, for the BD140-6 it will be in the range from 40 to 100.The complementary NPN transistor to the BD140 is the BD139.The BCP53 (SOT-223) is the SMD version of the BD140 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD140 with the BD140G, BD170, BD180, BD180G, BD231, BD238, BD238G, BD380, BD790, BD792, MJE252, MJE254 or MJE712.The BD140G transistor is the lead-free version of the BD140.The main manufacturers of the BD140 transistors are ON Semicondustor and STMicroelectronics.