The Siemens 3RG4075-0GJ13 is an UBERO inductive proximity switch in a 40mm limit-switch-style housing, with a normally-open (NO) output and PNP transistor switching. This is the variant that fits standard 40mm mounting hole patterns and delivers a PNP signal to a PLC or DC input card.
The 40mm housing is the standard industrial limit-switch form factor — mounts directly on machine frames or brackets using two M5 or M6 bolts on 40mm centers. The NO contact and PNP output mean the switch closes (sinks current to the load) when a target enters the sensing field, and the output is high when active. This is the most common configuration for interfacing with 24 VDC PLC inputs that expect a sourcing (PNP) signal.