Customer would like to know when the ATS46 became obsolete.
All models and serial numbers
Determine age of unit, product obsolescence
ATS46 became obsolete in January of 2004. The current replacement is the ATS48.
There are some differences that should be reviewed by the customer such as wiring, dimensions and ratings. Refer to this article for details on the differences: https://www.schneider-electric.us/en/faqs/FA175441/