.TR3 File

The tr3 file extension is associated with SPICE (Simulation Program with Integrated Circuit Emphasis) a free circuit simulation resource.

The tr3 files are contain transient analysis output file used by SPICE.

A tr3 file extension is related to the SPICE Transient Analysis output file format.

How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.