SINAMICS S120, Booksize format are available with 3 different cooling types. With the "internal air cooling" version, the power loss is dissipated to the inside of the cabinet through self-cooling and forced cooling. The "external air cooling" version is a version where the SINAMICS S120 heatsink extends outside the cabinet. This allows the power loss to be dissipated to an external cooling circuit. The "Cold-Plate cooling" is the third version. These particular units can be mounted on external heatsinks that, for instance, can be liquid cooled.

Up until now, the SINAMICS S120 Chassis format was only available in the version "internal air cooling". This series of units has now been expanded by a liquid-cooled version. Contrary to the Cold-Plate cooling, in this case, direct liquid cooling is used. This means that the power components are mounted on a heatsink through which cooling liquid flows.