2N3251 DATASHEET PDF

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The characteristic curves for datashdet parts and new parts like the 2N could be compared to see if the processes was changed but that will not be reliable if newer published data was not updated to reflect changes.

Even with the same manufacturer, a part may be moved to a new process changing its unguaranteed characteristics significantly. I wish this kind of information was unambiguously available for modern parts. The 2N looks like a good bet. Our website uses cookies! I datashset the same thing when drawing up parts lists and spend some time qualifying alternative parts and sources.

(PDF) 2N3251 Datasheet download

Any idea why instead of ? I found some audio related discussions about matching between Fairchild and On Semiconductor BC and BC series transistors which mentioned the large Ft variation but nothing detailed. I would not bother with an exact replacement because it is operating as a simple emitter follower.

The difference between two different part numbers may be just the time spent on the automated test equipment which directly translates into an additional cost of tens of cents per second. I daasheet this for the 2N and found them to be identical between and so I would assume Fairchild is either still using process 23 or they never updated the documentation.

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A BC is going to be a little slow.

Real-Time Measurement and Control

The image for CPV-2N is currently unavailable. Very few people are willing to carry out conclusive tests, and few of these are willing to post anything online. The image for is currently unavailable.

So it would make sense the 2N wouldn’t need selected unless there was past experience with inferior parts. I wonder if that is just a testing difference. I spent all night studying the LT and LM and that leaked over into seeing Q as a current source instead of follower: This is great, since the BC is a sort of rugged monster of a Datasheef, and it even datadheet a complementary part. The BC3x7 series typically has low internal base resistance which is why it’s not very noisy.

2N NTE Equivalent NTE PNP audio amplfier tr – Wholesale Electronics

A Central sales representative will confirm the availability of the plating type requested. I was not able to find any current Fairchild process documentation. I’m guessing that at switching speeds, the load capacitance was enough that it was necessary to have indefinite current output from this buffer.

The parts list in the service manual says “Selected from 2N”. By continuing to use our website, you agree with our use of cookies in accordance with our Cookie Policy. I doubt Tektronix was pushing the edge so much as just running their own quality control program on incoming parts.

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2N datasheet – Discussion Forums – National Instruments

On Sat, 2 Nov Some in this field do their research on transistor manufacturers and it is much more often than you think that you might get a counterfeit, unexpectedly inferior part, or even a bad batch if you’re not careful about your source. Some companies are better about announcing semiconductor process changes than others but I think the tenancy over time has been to hide more of this information. Robert Pease wrote that he kept a collection of “worst case” transistors for testing circuits.

I haven’t found an OnSemi datasheet that gives the Ft for the 2N, but the OnSemi datasheet shows enough differences between it and the BC that I wouldn’t assume they are the same die. Burst popcorn noise is impossible to test for inexpensively but is a solved problem now. Please call Click to view availability. At any rate, even datasheet curves are often not the same as the real device, so it helps to be “street wise” or you may end up accumulating mysterious problems in repair and design work.

Parts made in different factories can very well be different. The new topic will begin with this message. For full functionality of this site it is necessary to enable JavaScript.