Omron Corporation D4A-0100N Limit Switch Snap Action

The Omron D4A-0100N is a snap-action limit switch manufactured by Omron Corporation, designed to produce a fast, decisive electrical change when a moving part reaches a predefined travel limit. As a discrete-position sensor, it delivers a clear signal to control systems, enabling end-of-travel indication and position sensing within automation equipment, automation panels, and compact mechanical assemblies where space is at a premium. The D4A-0100N designation identifies this specific model within Omron's D4A family, a range known for compact form factors and straightforward actuation suitable for integration with PLCs and other digital controllers in diverse industrial environments. In practice, snap-action limit switches like the D4A-0100N are selected when a fast, unambiguous transition is required to drive machine logic, safety interlocks, and sequencing decisions, providing simple, reliable input signals from mechanical travel. This brief overview captures the essential identity and function of the Omron D4A-0100N, without altering its role as a standard industry limit switch for position detection.