Indicator Push Button Round 4pin

Description

Product Description The 16mm Round Illuminated Push Button Switch (commonly found under part numbers like the R16-503 series) is a compact, panel-mount power control switch featuring an integrated indicator light. Constructed with a durable, threaded polymer body, this switch houses an independent LED or neon lamp beneath its translucent, colored round cap (available in red, green, yellow, blue, and white). It utilizes a 4-Pin layout, which cleanly separates the switch contacts from the indicator light circuit. This allows the lamp to be wired to stay on constantly, light up only when the button is pressed, or act as an independent status indicator for another part of the system. It is available in both Latching / Self-Locking (clicks and locks on) or Momentary (springs back instantly) configurations. Key Specifications Model Footprint: R16-503 / Standard 16mm series Mounting Cutout Diameter: 16mm (≈5/8 inch) Terminal Configuration: 4 Pins (2 terminals for the ON/OFF switch contacts, 2 independent terminals for the indicator light) Electrical Rating: AC 3A / 250V or AC 6A / 125V (frequently paired with 12V DC systems as well) Included Hardware: Plastic/metal hex nut and rubber sealing washer Compatibility & Applications As a highly standardized 16mm electronic component, this 4-pin switch is entirely universal. It functions as a direct replacement for any standard 16mm round indicator switch and fits cleanly into any control panel with a 16mm circular cutout hole. It is widely used across the following electronics and hardware platforms: 1. Arduino, Robotics & DIY Prototyping Custom Power Panels: Popular among hobbyists building project enclosures with Arduino, Raspberry Pi, or ESP32 microcontrollers where a clear, visual power-status light is needed. Test Benches: Serves as a localized circuit-breaker toggle or signal injector switch on DIY laboratory testing jigs. 2. Commercial Equipment & Control Arrays Industrial Control Boxes: Used in modular control panels to signify active machinery states or system readiness. Arcade & Simulation Cabinets: Fits perfectly into customized DIY arcade control panels, flight simulator decks, or virtual pinball machines as an illuminated service button. 3. Automotive & Household Modification Low-Draw Dash Toggles: Used as a custom dashboard button for interior lighting, accent LEDs, or low-voltage accessory relays in cars, trucks, and camper vans. Small Appliance Repair: Serves as a drop-in replacement power switch for commercial beverage dispensers, laminators, and manufacturing equipment.