In article ,
mentioned...
On Tue, 9 Sep 2003 20:22:54 -0700, the renowned Watson A.Name - "Watt
Sun" wrote:

In article ,
mentioned...
On Tue, 9 Sep 2003 02:20:01 -0700, the renowned Watrson A.Name
wrote:

The TO-92 transistor package is marked

C1815GR
PH 3 9
?
From my past experience I surmise that it's a 2SC1815 from Philips,
right? Also, I surmise that this is a Japanese transistor number.

long story snipped

Watch that the "GR" is the high-beta bin selection of this very
popular (in Asia, anyway) part.

Actually, according to the Philips data sheet the GR is the middle or
200 to 400 range of the 3 beta selections.

Yes, there's a higher one on the data sheets, but "Y" is the most
common one seen in practice, IME.

I checked Toshiba's data sheet and oddly, their gains are different
than Philips'; they have 4 ranges instead of 3:

Note: hFE classification:
O: 70~140, Y: 120~240, GR: 200~400, BL: 350~700

Best regards,
Spehro Pefhany


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