BC440-4 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 40 to 70
• Transition Frequency, min: 50 MHz
• Operating and Storage Junction Temperature Range: -55 to +200 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The BC440-4 transistor can have a current gain of 40 to 70. The gain of the BC440 will be in the range from 40 to 250, for the BC440-5 it will be in the range from 60 to 130, for the BC440-6 it will be in the range from 115 to 250.The complementary PNP transistor to the BC440-4 is the BC460-4.You can replace the BC440-4 with the 2N1480, 2N1482, 2N3020, 2N3108, 2N3110, 2N4030, 2N4031, 2N4237, 2N4238, 2N4239, 2N5152, 2N5321, 2N5334, 2N5335, 2N5336, 2SC512, 2SC512-R, BC140, BC140-6, BC141, BC141-6, BC441 or BC441-4.