1PC 12mm Flat Yellow Light Metal Button Switch — SelfLocking (Latching) Round, 5V / 12V / 24V Key benefits Simple, reliable on/off control: Selflocking (latching) design holds the circuit state after each press, eliminating the need to hold the button for continuous operation. Clear visual status: Builtin flat yellow indicator provides an immediate visual cue when the switch is powered, helping reduce user errors and improve panel readability. Compact and durable: Metal construction and a 12mm round panel footprint deliver a robust, spacesaving switch suitable for repeated use. What it does and why you need it This 12mm round metal button switch combines a lowprofile illuminated cap with a selflocking mechanism, giving you a compact, professionallooking control point for small equipment and panels. It solves common problems like unclear power state, fragile plastic switches, and bulky controls by offering a durable metal body, a flat yellow indicator for status, and a small panel cutout footprint. Key attributes Quantity: 1 piece Mounting size: 12mm round (panelmount) Cap style: Flat, lowprofile Indicator: Yellow illuminated cap (requires matching supply voltage for illumination) Operation: Selflocking (latching) push operation — press once to latch ON, press again to unlatch OFF Voltage compatibility: Designed for use with 5V, 12V, or 24V DC power supplies Material: Metal body and bezel for enhanced durability and a professional finish Wiring: Rear terminals for connection to power and load (ensure correct wiring for both switch contact and illumination) Performance and compatibility Compatible with common lowvoltage DC systems (5V, 12V, 24V). Use the matching voltage to power the indicator LED and the switching circuit as required. Compact 12mm panel size fits many instrument panels, enclosures, and custom housings where space is limited. Metal construction resists wear from repeated actuation and provides a stable mounting point for frequent use. Use cases DIY electronics and maker projects: Reliable power or mode switch for microcontroller projects (Arduino, Raspberry Pi) where a clear visual indicator is helpful. Control panels and industrial equipment: Small, durable on/off control for status lights, conveyor or machine control circuits in cabinets and operator panels. Automotive and mobile devices: Lowprofile illuminated switch for accessory power control on 12V systems (audio, lighting, pumps), where a clear yellow indicator confirms activation. Installation and notes Designed for panel mounting in a 12mm round hole; tighten bezel securely for stable installation. Match the switch wiring to your system voltage (5V, 12V, or 24V) for correct illumination and operation. Verify wiring orientation and connections before powering the circuit. Intended for lowvoltage DC applications; ensure compatibility with your load and system requirements. This 1PC 12mm flat yellow light metal button switch offers a compact, durable, and easytoread solution for on/off control in a wide range of lowvoltage DC applications.