[sdiy] Thermosensitive Chip Resistors

[Jay Schwichtenberg]

I was thumbing (OK, drooling) at the new Digikey catalog I got today. I
found these thermosensitive chip resistors in it:

http://www.panasonic.com/industrial/components/pdf/AOF0000CE1.pdf

Page 865 in catalog T041.

They look interesting since some have a PTC of 3300 ppm/C, come in 1K and
can fit under a chip. Only issue looks to be the +/-10% tracking tolerance.
Anyone have any ideas if these would be good enought for expo tempco?

Thanks
Jay