This 1PC 16MM Momentary Push Button Switch With Blue LED lighting 4Pin R16503 is a compact switch designed for panel installation in 16mm openings. It provides momentary contact with an integrated blue LED indicator, offering clear visual feedback and easy location in low light. The 4pin configuration supports both the switch and the LED in a single component, simplifying wiring and installation. Key benefits Immediate tactile input: momentary action completes the circuit only while the button is pressed, enabling precise user control for start, trigger, or reset functions. Visible status indicator: blue LED lights during operation, helping users identify the requested action and the switch status at a glance. Simplified wiring: 4pin configuration accommodates both switch and LED connections, reducing wiring complexity in compact panels. Space saving design: 16mm diameter footprint fits into small or constrained panel spaces without sacrificing functionality. Reliable and versatile: suitable for a wide range of control applications where a short press should activate a function and provide illumination. Key attributes Function: Momentary push button switch with blue LED lighting Size: 16mm diameter Pins: 4pin configuration Model: R16503 Quantity: 1 piece (1PC) Illumination: Blue LED indicator integrated with the switch Action: Momentary (circuit closes when pressed, opens when released) Specifications at a glance Type: Push button switch with momentary action Lighting: Integrated blue LED Contact arrangement: 4pin configuration Diameter: 16mm Part number: R16503 Quantity: 1 Use cases and applications Microcontroller and electronics projects: use as a reset, start, or user input button with built in illumination for easy visibility on a crowded breadboard or enclosure. Arcade and DIY controllers: serve as a start or confirm button with a clearly visible blue indicator for user feedback in low light or dark environments. Panel control and testing stations: function as a momentary trigger in equipment test rigs or control panels, with the LED aiding location and status confirmation. In summary, the 1PC 16MM Momentary Push Button Switch With Blue LED lighting 4Pin R16503 offers a compact, easy to wire solution with instant tactile response and a visible blue indicator. It is well suited for panel mounted applications where a momentary input and clear status indication are required.