BF423 Transistor Pinout, Features, Equivalents, Applications and Other Details
In this post you will find all the details about BF423 transistor pinout, features, equivalents, applications and other useful information about this PNP high voltage transistor.
Features / Technical Specifications:
- Package Type: TO-92
- Transistor Type: PNP
- Max Collector Current(IC): 50mA
- Max Collector-Emitter Voltage (VCE): -250V
- Max Collector-Base Voltage (VCB): –250V
- Max Emitter-Base Voltage (VBE): 5V
- Max Collector Dissipation (Pc): 830 Milliwatt
- Max Transition Frequency (fT): 60 MHz
- DC Current Gain (hFE): 50
- Max Storage, Operating & Junction temperature range: -55 to +150 Centigrade
BF423 Transistor Explained / Description:
BF423 is a PNP bipolar junction transistor manufactured in TO-92 plastic package. The pins of the transistor are arranged as follows: The first pin of the transistor is emitter, second pin is collector and the third pin is base. The maximum collector current of the transistor is 50mA, the max collector to emitter voltage is -250V, maximum collector to base voltage is -250V, minimum DC current gain is 50, maximum collector dissipation is 830mW and the maximum transition frequency is 60 MHz, however some manufacturers also make it with 100MHz (fT) or transition frequency.
The main purpose for which the manufacturers make it is for using in class B video output circuits of monitors and televisions but due to its high voltage capabilities and other specifications this transistor can also be used in variety of other applications.
Where We Can Use it & How to Use:
As described above this transistor can be used in TV and monitors class B video output circuits but not limited to these uses and can also be used in other applications such as AC doorbells and variety of different AC applications.
NPN Complementary:
NPN complimentary of BF423 is BF422
Replacement and Equivalent:
BF421, 2SA1624, 2SA1767, KTA1277
Applications:
TV and monitor class B video circuitry
Switching circuits
And many other general purpose and high voltage applications
Safe Operating Guidelines / Absolute Maximum Ratings:
To operate this transistor safely in your design or circuits it is recommended to follow these guidelines. First of all the important point to remember is do not use this transistor to its absolute maximum ratings and always stay 20% below from its max ratings which are described above and also in its datasheet. The maximum collector current is 50mA therefore do not drive load of more than 40mA, the maximum collector to emitter voltage is 250V therefore do not drive load of more than 200V and always store or operate the transistor at temperature above -55°C and below +150 °C.
Datasheet:
To download the datasheet just copy and paste the below link in your browser.
https://cdn.datasheetspdf.com/pdf-down/B/F/4/BF423_PhilipsSemiconductors.pdf
