8 Apr
2012
8 Apr
'12
2:22 p.m.
On 2012 Apr 8, at 1:34 PM, Rob Jarratt wrote:
I hope I haven't made a mistake here. Rather than
go to Farnell
where I need
a minimum order amount, I looked on Ebay and found someone with
some TIP125s
there.
I had assumed they were all the same and just chose this one:
http://www.ebay.co.uk/itm/TIP125-Transistor-/290672643190?
pt=LH_DefaultDomai
n_3&hash=item43ad708c76.
I haven't spent a lot, so if I have bought the wrong thing it is no
big deal
to go and find the right ones instead. On the original the only other
marking (apart from a TI logo) is "8702", but my web searches don't
seem to
indicate that this means anything. The Ebay one has no other
markings to
help me distinguish anything either. So, I don't know if I have
bought the
wrong thing or not.
Are they all likely to be similar enough not to matter? Or should I be
looking for a closer match? Not that I know what a closer match
would be.
Looks fine, the TIP125 is what matters.
The 8702 on yours is most likely a date code. Many semiconductors and
other components have a date code stamped on them in addition to the
part number and manufacturer id/logo. One of the most common forms of
date code (particularly for North American manufacturers) is yyww
where yy=LSDs of year, ww=week of year, so 8702 would indicate the
device was manufactured in the 2nd week of 1987. Look at the ICs in
your drive, they may have similar codes for around the same period.