The Siemens 3RH1911-1MA11-ZW95 is an auxiliary switch block with a 1NO+1NC contact configuration, designed for DIN EN 50005 mounting rails. It uses screw terminals with connection from below, intended for use with contactor relays and contactors that switch motor loads in sizes 00.
Panel Integration
The block snaps onto a DIN EN 50005 rail inside a control panel, adding auxiliary contacts to the contactor or contactor relay without additional wiring space. Screw terminals from below match typical panel layouts where wire entry is from the cable duct.