BF422 Transistor: BJT, TO-92, Datasheet, Pinout

BF422 Pinout

Symbol

BF422 Symbol

Footprint

BF422 Footprint

3D Model

BF422 3D Model

The BF422  transistor is a BJT NPN  transistor with a TO-92 plastic packaging. The first pin of the transistor is labelled "Emitter," the second pin is labelled "Collector," and the third pin is labelled "Base," as seen in the diagram above. The transistor has a maximum collector current of 50mA, a maximum collector to emitter voltage of 250V, a maximum collector to base voltage of 250V.  an emitter to base voltage of 5V, a maximum collector dissipation of 830  mW, and a DC current gain of 50. Although the maximum transition frequency is 60  MHz, some manufacturers produce it with a transition frequency of 100MHz.

• 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 ℃

• Switching Circuits

• Class B Video Output Stages Of TV and Monitors

• General-purpose and high voltage applications

The equivalent for BF422:

• ZTX457

• STX0560

As previously stated, BF422 is primarily intended for use in the Class B   video output circuitry of colour televisions and monitors, but it may also be employed in a broad range of high-voltage applications, such as AC  doorbell circuits.

Please follow the rules below to achieve long-term performance from the BF422 transistor: Never push the transistor to its absolute maximum ratings; instead, remain 20% below the maximum values. The transistor's maximum collector current is 50mA; consequently, do not drive loads above 40mA; the transistor's maximum collector to emitter voltage is 250V; therefore, do not drive loads exceeding 200V; and always store or use the transistor at temperatures between -55°C and +150°C.

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BF422 Package