A475 is probably the marking on a SMD diode. For spec do a search on ON semi using the package style. Then you can search for A475 to get to the real PN.
Suggestion: It appears that A475 needs more information or perhaps a context in which it is used. E.g. A475 could stand for:
1. The ASTM Std A475 might be checked for applicability since it deals with galvanization.
2. A475 could be interpreted as 475 milliampere rating of the diode.
3. Etc.