BC140-6 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 3.7 W
• DC Current Gain (h_fe): 40 to 100
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BC140-6 is the BC160-6.You can replace the BC140-6 with the 2N1480, 2N1482, 2N3020, 2N3108, 2N3110, 2N4030, 2N4031, 2N4237, 2N4238, 2N4239, 2N5321, 2N5334, 2N5335, 2N5336, 2SC512, BC140, BC141, BC141-6, BC440 or BC441.