[sdiy] Extra designations in transistor part number

[Graham Atkins]

BU........

Seriously though, a quick Google found this info:-

http://www.qsl.net/yo5ofh/doc/transistor_codes.htm

Could it be CBU means it conforms to classes B, C & Unclassified ?

Graham

On 2 Dec 2009, at 18:52, David Ingebretsen wrote:

> I need to buy some BC550's and BC560's. The schematic calls for a  
> "C" class,
> so I need 550C's and 560C's. The ones I can get at Mouser have extra  
> letters
> BU after the C. I assume these refer to temperature, or some other  
> spec. but
> I have come up short trying to figure it out.
>
> I've looked at a dozen different datasheets, but they only clarify the
> difference between the "A", "B", and "C" classes, not the extra "BU"
> designation.
>
> What is the difference between a BC550CBU and a BC550C?
>
> Thanks
> David
>
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