Places to find LTSpice models - cellularmitosis/LTSpice-parts GitHub Wiki

Fairchild: https://www.fairchildsemi.com/design/models/
On-semi: http://www.onsemi.com/
NXP: http://www.nxp.com/
This appears to be a mirror of the old Philips semiconductor website, which had some Spice models which work with LTSpice: http://web.rfoe.net:8000/ziliaoxiazai/PHILIPS/models/spicespar/data/bs250.html
This is a huge list of Spice models: http://homepages.which.net/~paul.hills/Circuits/Spice/ModelIndex.html#b
- see also http://homepages.which.net/~paul.hills/Circuits/Spice/SpiceBody.html
- Some of the *.lib files he mentions can be found via a google search, e.g.: