TNODE is used to identify any nodes of models that are considered thermal nodes of that model. It is primarily used when calculating measurements for the model, such as the power dissipated for the model. This is an important quantity when using a thermal simulator. In these models, thermal quantities are represented as current and voltage and should not be included when calculating the electrical quantities of the model. This element on a node tells the software to skip those nodes when calculating electrical properties. If using a thermal solver, you should place this element on any thermal node of models you are using.
This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.