| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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4 pcs
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4 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The BF421 is a PNP high-voltage transistor manufactured by Motorola Semiconductor, designed for applications requiring robust performance in high-voltage environments. This transistor offers a maximum collector-base and collector-emitter voltage of 300V, making it suitable for demanding circuits.
Key electrical characteristics include a DC current gain (hFE) of 50 minimum at -25mA and -20V, a peak collector current of 100mA, and a transition frequency (fT) of 60MHz at -10mA and -10V. The feedback capacitance (Cre) is a low 1.6pF maximum at 1MHz, contributing to its suitability for video output stages.
Packaged in a standard TO-92 plastic package, the BF421 is designed for through-hole mounting. It operates within a wide temperature range from -65°C to 150°C, with a total power dissipation of 830mW at ambient temperatures up to 25°C.
This transistor is an excellent choice for class-B video output stages in color television and professional monitor equipment, where its low feedback capacitance and high voltage capabilities are advantageous.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.93 | $1.93 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum collector-emitter voltage (VCEO) for the BF421 is 300V.
The BF421 has a minimum DC current gain (hFE) of 50 under the conditions of IC = -25 mA and VCE = -20 V.
The transition frequency (fT) of the BF421 is a minimum of 60 MHz at IC = -10 mA and VCE = -10 V.
The BF421 transistor is supplied in a TO-226-3 package.
The BF421 can operate in an ambient temperature range of -65°C to 150°C.