SINAMICS G120X IP20 push-through frame for FSB Push-through mounting frame as as supplementary system component for the SINAMICS G120X frequency converter. The optional push-through mounting frame is used to mount SINAMICS G120X converter frame sizes FSA to FSG in a control cabinet, with the heat sink passing through the control cabinet wall. Push-through mounting ensures that the converter complies with protection type IP20/UL Open Type. Protection type IP20 with an optional push-through mounting frame permits a space-saving setup when installed in the control cabinet, thus ensuring that power losses are dissipated via an external heat sink and separate, internal air circulation. SINAMICS – simply my drive.