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R-TOOLS MAXX Heat Sink Selector Tool

Your next generation heat sink calculator is here!


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R-TOOLS MAXX, the new version of R-Tools, is now available!

R-TOOLS MAXX logo and simulation



R-TOOLS MAXX is a no-charge, on-line simulation software that allows users to model the optimum air or liquid cooled heat sink solution tailored to your project requirements. R-TOOLS MAXX generates a simulation of the most efficient heat sink model, and the simulation results aid in reducing design time and increasing the reliability of the finished heat sink product, all before the first prototype is even built.

R-TOOLS MAXX lets users input parameters of their application such as the temperature boundaries, size of the heat source (IGBT, SCR, etc.), layout of the power electronics, and several other design criteria. The program’s simulation engine will then output an air or liquid cooled heat sink design along with 3D visualization tools to provide users an overview of the heat sink thermal behavior and heat spread over the surface of the heat sink. This results in a more accurate technical solution compared to traditional data sheets and graphs.



  • Free to use
  • Faster iterations
  • Step-by-step guide walks users through selection/simulation process
  • Detailed explanation of key design parameters
  • Software can select the optimum solution or empower the user with freedom to fully customize the design
  • A full library of thermal key terms to help you design a better heat sink
  • Compatibility with latest versions of browsers such as Chrome, Firefox, Safari, and Opera


Training Videos