"japanese" Transistors To "european"

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Thanks.I have tried entering markings on various sites to identify the component,but to no avail.I have also contacted Nikko-Electronics but they to are unaware of such a component,as are CPC.I wonder if the markings,BC QU,is a code used by Sony,or in this case, Fujitsu Ten?I have noticed that Sony tend to use components with similar markings,does anybody know what the markings refer to?Thanks.
 
Hi,
I believe the two and three digit numbers are simply manufacturer codes, probably intended for mass production.

Since most will be buying on a 5000 reel the code just confirms that they have the labelled reel correctly loaded on the assembly machine.

I would not expect these codes to be unique, there are just too few digits.

You will need the manufaturer and chip name to identify the type.
 
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