Hi,
can anybody suggest replacements for BC556C & BC546C transistors please.
They are being used in a 52V amplifier circuit and need a Hfe of around 500.
Thanks,
Pete
can anybody suggest replacements for BC556C & BC546C transistors please.
They are being used in a 52V amplifier circuit and need a Hfe of around 500.
Thanks,
Pete
Last edited:
thanks Mark,
I have emailed them, but they appear to manufacture rather than sell originals😕
I sure hope they sell smaller quantities though.😱
Regards,
Pete
I have emailed them, but they appear to manufacture rather than sell originals😕
I sure hope they sell smaller quantities though.😱
Regards,
Pete
BC546 and BC556 are available at Jaycar....
nearest Jaycar to you should be Penrith.
Although I note BC546 Hfe is listed as between 110 and 450, so are you asking for something similar to a BC546 only with more gain?
nearest Jaycar to you should be Penrith.
Although I note BC546 Hfe is listed as between 110 and 450, so are you asking for something similar to a BC546 only with more gain?
ok, scratch that last I see the BC546C has more gain, unfortunately Jaycar just list as BC546 without A, B or C spec,
Rochester lists them as "Fairchild BC546C" devices, leading me to believe the parts were made by Fairchild. Incidentally, Fairchild refreshed their datasheet very recently {see Note 1}, which may suggest the parts are still rolling off the manufacturing line as long as you order sufficient quantity from the factory. Rochester will sell you quantity=one (at USD 0.05) if you wish; however their minimum order is USD 50.00.
Over the long term, the shrewd strategy might be to assemble a $50 total order, of a dozen various difficult-to-source parts that have always annoyed you. Then sit on your monstrous stash heap and guffaw at the poor devils in 2017 who can't find any, at all, at any price. For perspective, that same fifty dollars could purchase three or four bottles of mid-grade table wine instead, whoopie. It isn't a budget-busting expense requiring a shift to ramen noodles and canned beans for 3 months.
Over the long term, the shrewd strategy might be to assemble a $50 total order, of a dozen various difficult-to-source parts that have always annoyed you. Then sit on your monstrous stash heap and guffaw at the poor devils in 2017 who can't find any, at all, at any price. For perspective, that same fifty dollars could purchase three or four bottles of mid-grade table wine instead, whoopie. It isn't a budget-busting expense requiring a shift to ramen noodles and canned beans for 3 months.
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Another possibility might be to purchase the BC550C + BC560C instead. They are identical in every respect, except max collector voltage, and are widely available at numerous distributors. Then cobble together a little lab setup that allows you to measure VCBO and/or VCEO. You may find that the vast bulk of the BC550C population distribution meets the high-VCBO spec (BC546C), but some parts are sold as low-VCBO devices (BC550C) to meet market demand. At lower prices to boot!
All I know about ordering difficult to find transistors is that if you need one, order five. So many of them will fail a bench test. I ordered a batch of transistors for my N55ES power amp and most of them embarrassed themselves on an analog signature test comparison.
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