The A3PLE1-6L2L-11 is an illuminated momentary pushbutton with an extended operator, blue lens, rated for 24V, and equipped with one normally-open and one normally-closed contact block. This is a panel-mount control device used on operator stations and control desks where a maintained visual indication of the button state is needed.
The 24V rating governs the lamp voltage — the integral LED or incandescent illumination is designed for a 24V DC supply, not line voltage. The 1NO+1NC contact configuration gives one form-C set (common, normally-open, normally-closed) for control logic; the extended operator (longer plunger) suits applications where the button must protrude through a thick panel overlay or be reachable through a guard. The blue lens color is a standard signaling choice, often used for reset or acknowledge functions on a machine control station.