Membrane switch with LEDs for PCB

Membrane switch is a user interface component that integrates key functions, indicators, and control panels into a single, low-profile assembly. It typically consists of six main layers:

• Graphic Overlay (Panel) – The visible interface with printed icons, text, or symbols.
  
  
• Spacer –Combination Panel with PCB.
  
  
• Circuit Layer – Conductive elements (printed PET circuits, PCB, or FPC) that transmit signals, with metal dome and several Leds.
  
  

• Adhesive Backing – Secures the switch assembly to the end product.
  
  

When a user presses a key, the tactile layer contacts the underlying conductive pads, closing the circuit and sending an input signal. Once released, the dome returns to its original shape, breaking the circuit. These switches are valued for their sealing properties, moisture resistance, easy cleaning, high integration, and long lifespan. Industries such as electronic communication, industrial control, medical devices, automotive, rail transportation, household appliances, aerospace, and military equipment commonly utilize membrane switches for their robust performance and reliability.