BF422 Transistor Pinout, Equivalent, Applications, Features and More
Today we are going to discuss about BF422 transistor pinout, equivalent, applications, features and other details about this bipolar junction transistor.
Features / Technical Specifications:
- Package Type: TO-92
- Transistor Type: NPN
- 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
BF422 Transistor Explained / Description:
BF422 is a BJT NPN transistor available in TO-92 plastic package. As shown in the image above 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, maximum collector to emitter voltage of the transistor is 250V, the maximum collector to base voltage is also 250V, emitter to base voltage is 5V, maximum collector dissipation is 830mW and the DC current gain of the transistor is 50. The max transition frequency is 60MHz but some manufactures make it with 100MHz transition frequency.
The transistor is mainly designed to use in class B video output circuitry of monitors and colour television. But it is not limited to only this application and can also be used for other high voltage and switching applications.
Where We Can Use it & How to Use:
As mentioned above this transistor is primarily designed to use in Class B video output circuitry of Colour TVs and monitors but can also be used in wide variety of high voltage applications such as AC doorbell circuits.
PNP Complementary:
PNP Complementary of BF422 is BF423.
Replacement and Equivalent:
ZTX457, STX0560
Applications:
Switching Circuits
Class B Video Output Stages Of TV and Monitors
And many other general purpose and high voltage applications
Safe Operating Guidelines / Absolute Maximum Ratings:
To get long term performance with this transistor please follow the below guidelines:
Do not drive the transistor on its absolute maximum ratings and always stay 20% below from its max ratings. The maximum collector current of the transistor is 50mA therefore do not drive load of more than 40mA, the maximum collector to emitter voltage of the transistor 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/BF422_PhilipsSemiconductors.pdf
