The A3SSCD-6AAB-111 is a 3-position selector switch with left-right spring return and a cam mechanism, configured with one normally-open and one normally-closed contact pair. This is a panel-mount control device for selecting between two momentary positions, with the handle returning to center when released.
The description — "SEL 3POS L R-SPRINGRTN CAM C 1NO-1NC" — breaks down as a selector switch, 3 positions (left, center, right), with spring return from both left and right back to center. The cam mechanism defines the contact actuation pattern, and the contact configuration is 1 normally-open plus 1 normally-closed. This is a standard two-way momentary selector, used where an operator needs to jog a function in either direction (e.g., raise/lower, open/close) with automatic return to neutral.