The A3SSCD-6AAB-91 is a 3-position selector switch from the A3 series, configured with left/right spring return and a cam operator that drives one normally-open and one normally-closed contact pair (1NO+1NC). Spring return to center means the switch stays in the left or right position only while held — release returns it to the center-off state. That suits momentary control actions like jog, inch, or manual override on a conveyor or machine axis.
What the 1NO+1NC contact arrangement means for fit
The 1NO+1NC contact block gives one set of normally-open and one normally-closed contacts, switched simultaneously by the cam. In a safety or control circuit, the NC pair can be wired as a feedback signal (switch actuated = contact opens) while the NO pair drives the action. That is a common pattern for two-hand control or mode-select interlock schemes.
As a panel-mount selector switch, the A3SSCD-6AAB-91 fits a standard 22.5 mm or 30 mm cutout (A3 series footprint). The cam operator and spring-return mechanism are enclosed in the switch body; the 1NO+1NC contact block clips onto the back. Verify the panel thickness and mounting nut clearance before committing the cutout — the A3 series typically accommodates 1–6 mm panels.