Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-92
Pinout of BF423
The BF423 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads. Here is an image showing the pin diagram of this transistor.
Complementary NPN transistor
The complementary NPN transistor to the BF423 is the BF422.
SMD Version of BF423 transistor
The BF621 (SOT-89), BF623 (SOT-89), BF821 (SOT-23) and BF823 (SOT-23) is the SMD version of the BF423 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.