.e3s is E3.series project
Key Features: .E3S File Extension
What is an .E3S file?
The e3s file extension is mainly associated with the E3.series application that is used to design and documentation of Wire harnesses and cable assemblies.
The typical .e3s files contain saved E3.series projects. From version 2011 E3.WireWorks also uses e3s file extension for project files.