"n cook" wrote in message
...
I was checking for data on an FT5154 transistor of 1976 kit.
An old German transistor data manual showed it equivalent to 2N5154.
A straight block of 50 or so others listed in that manual from FT1724 to
FT5154 showed the same 2N equivalence.
Anyone know of a general rule ?
FT??? in hundreds don't seem to have direct number 2N equivalents

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/





Sometimes the mfrs make a line of transistors having very similar
characteristics, differing in only a few specific elements, such as Vce,
Ic(max), etc. They might have numbered them sequentially, but there is (was) no
requirement or guideline to do that. Part numbers are arbitrary in most cases,
and have no correlation between manufacturers. If a manufacturer second sources
a part, then it's good sense to assign the same or very similar part number, but
again, no specific requirement.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Never take a laxative and a sleeping pill at the same time!!