1PC KD222 Blue 17mm Square PushButton Switch — Self‑Reset (Momentary) with 3V Light, 8 Pins A compact, illuminated momentary pushbutton designed for control panels, DIY electronics and repairs. The KD222 provides a clear visual indication with a builtin 3V lamp and a selfresetting (momentary) action, making it easy to add a professional, userfriendly control point to your project. Key benefits Illuminated feedback: Builtin 3V light gives immediate visual confirmation of switch status for safer, clearer operation. Momentary action: Selfreset (momentary) design returns to its default position automatically — ideal for start, reset, doorbell, or momentary control functions. Flexible wiring: 8pin arrangement separates the illumination circuit from the switching contacts, allowing independent control of indicator lighting and load switching. Compact footprint: 17mm square face keeps the switch lowprofile and suitable for tight panel layouts. Key attributes Model: KD222 Quantity: 1PC Color: Blue Size: 17mm square face Action: Selfreset (momentary) Contact type: Open (normally open) Illumination: Builtin 3V light Pins: 8 pins for separate switch and lamp connections Typical applications Electronics projects and prototyping: Mount on instrument panels, control boxes, or breadboardbased projects that need an illuminated momentary push control. Equipment and appliance : worn or nonilluminated buttons in machines where a momentary, visible control is required. DIY control panels and hobby builds: Use as a start/reset button or status indicator in custom enclosures and Arduino/MCU projects. Installation and use notes The 3V light is integral to the switch; provide the correct 3V supply for the illumination circuit. If using a highervoltage source, include an appropriate resistor or LED driver in series with the light. The 8 pins allow separate wiring for the lamp and the switch contacts; check your circuit diagram or test continuity to identify pin functions before final wiring. Confirm polarity for the illumination pins where applicable and test the switch in a lowpower setup before final installation. This KD222 illuminated, momentary pushbutton is a straightforward solution when you need a compact, visible, selfreset control point with separate wiring for lamp and contacts.