Seed MPN and class definition
The Omron SS-1GL-ET-4-ND is a general-purpose limit switch — a snap-action electromechanical position sensor mounted to a machine frame so its actuator trips when a moving part reaches a set point, opening or closing the contact block to feed a discrete input back to the control system. Limit switches are the workhorse end-of-travel feedback on conveyors, packaging machinery, machine-tool guards, and door-interlock chains, where a hard mechanical trip and a confirmed contact state matter more than the soft output of a proximity sensor.
Lifecycle status and production reality
The listed lifecycle stage for SS-1GL-ET-4-ND is current production under the Omron brand, so the order code is still being manufactured and accepts new orders rather than drawing down last-time-buy stock. Because Omron publishes the SS series as an active general-purpose family, a buyer specifying SS-1GL-ET-4-ND into a running BOM is buying into a line that the factory continues to ship, not a part that has been silently retired.