What it is and where it sits
The XS518B1MAL5 is a Telemecanique inductive proximity sensor listed under Square D Switches & Sensors, used to detect the presence of metallic targets without physical contact — the standard job for this class of device on conveyors, machine tools, and packaging lines. Lifecycle stage on this order code reads current, so the part is not flagged for last-time-buy or phase-out at the source level; procurement can treat the BOM line as live.
Sourcing posture
Lifecycle stage is current with no flagged successor on record, so the line is specified into the BOM and quoted against an RFQ; no substitute is grounded in available evidence.