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Transistor BFR91A, NPN, TO-50 /SOT-37/

I have never seen nor used one. Collector — Base Voltage Vcbo.

For a better experience, please enable JavaScript in your browser before proceeding. Fluke, Mikroelektronika, Knipex and Logitech. Datasheets, Manuals or Parts. A 2N in the output should increase the power OK with a heatsink. Forums New posts Search forums. Media New datashee New comments Search media.

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BFR91A Datasheet PDF – Planeta Semiconductor

The original circuit used good high frequency transistors but you are using ordinary “general purpose” transistors that might melt with a supply that is as high as 12V. Collector — Emitter Voltage Vceo. If the original project has an output of mW then with the general bfr9a transistors its output might be only 50mW. Replacement Transformer Started by ncag Today at 7: Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

Not sure the will cut it: Power Dissipation Pd [Tamb.

Add to cart On stock. Telecommunication measuring equipment Cable and pipe tracing Cooper networks IT networks Optical networks Spectrum analysers more A small current entering the base is amplified to produce a large collector and emitter current.


To participate you need to register. An old 2N is in an old metal case. Now I have hundreds of PN plastic. I am going to replace transistor!! I haven’t used them for about 46 years but they probably still work. Its maximum allowed heating is only mW but the max allowed heating is mW for a newer 2N Soldering equipment Soldering irons Soldering stations HotAir stations Desoldering stations Multifunction stations more Comfort Flexible options, including door to bfr91q transportation.

Willen Well-Known Member Jul 14, Please warn me if doing wrong! Observe precautions for handling.

A 2N has better high frequency gain than a 2N but both have much less gain than the microwave transistors in the original project. Willen Well-Known Member Jul 15, Potentiometer Questions Started by norbss Yesterday at Click here to register now.