What SS-10D-T is
The Omron SS-10D-T is a subminiature limit switch in the SS series, built for end-of-travel and position-detection duty where a compact SPDT body is needed. Its single-pole double-throw contact configuration lets one switch serve either a normally open or normally closed logic path depending on how the installer wires the common terminal. The switch sits in the Limit Switches category, which means it is specified against mechanical position sensing — actuator plunger or lever closing on a target — rather than against a sensor loop or fieldbus signal.
SPDT contact logic in a subminiature body
The SPDT contact arrangement is the deciding feature for an integrator: one common terminal plus one NO and one NC pole in the same housing, so a single device can feed both a stop signal and a status signal back to the control cabinet without adding a relay. Snap-action subminiature switches in this Omron line are routinely used on machine guards, door interlocks, and small mechanism end-stop detection where panel space is tight.