What you're sourcing
The Telemecanique XUAH0515S is a barrel-style diffuse photoelectric sensor in the XUA miniature family, with a stated detection range of 50 mm. It sits in the photoelectric sensor class used inside control panels and machine cells for short-range object detection — diffuse reflection, so the target itself is the reflector and no separate reflector is needed.
Lifecycle posture
Closest same-family peer — XUAH0525
The closest same-family candidate on file is the Telemecanique XUAH0525 — also XUA, also diffuse, also 12 to 24 VDC, 100 mA load, 8 mm barrel, 2 m PVC cable, 3-wire, NC PNP output, with a 1.9 in sensing distance and 0.75 millisecond response time. Sensing distance stays close to the XUAH0515S 50 mm figure. Confirm output configuration and response time against the XUAH0515S datasheet before treating it as a drop-in.