BC440-5 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): 60 to 130
• 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 BC440-5 transistor can have a current gain of 60 to 130. The gain of the BC440 will be in the range from 40 to 250, for the BC440-4 it will be in the range from 40 to 70, for the BC440-6 it will be in the range from 115 to 250.The complementary PNP transistor to the BC440-5 is the BC460-5.The 2SC3912 (SOT-23), 2SC3913 (SOT-23), 2SC3914 (SOT-23), 2SC3915 (SOT-23) and MMBT4400 (SOT-23) is the SMD version of the BC440-5 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC440-5 with the 2N2270, 2N3725, 2N3725A, 2N4237, 2N4238, 2N4239, 2N5321, 2N5334, 2N5335, 2N5337, 2SC512, 2SC512-O, BC140, BC141, BC441 or BC441-5.