What is a metal dome membrane switch?

Metal Dome Membrane Switches, or Dome Membrane Switches, leverage premium S301 stainless steel meticulously shaped into domes to create highly responsive, tactile switches. These domes come in four primary shapes: four-legged, triangle, round, and oblong, with diameters ranging from 6mm to 20mm.

Actuation force, a critical parameter, refers to the minimum force needed to depress the dome, varying from 180g to 600g for these switches. Metal Dome Membrane Switches boast a lifespan of around 500,000 to 2,000,000 cycles, depending on the specific model and usage conditions.

The working principle of these switches involves the deformation of the metal dome, creating a connection between the anode and cathode when a key is pressed. Metal domes placed on the printed circuit board through pressure-sensitive adhesive tape make contact with the secondary pathway when pressed, thereby closing the circuit.

In conclusion, Metal Dome Membrane Switches offer stable, clear feedback, and excellent electrical performance, making them suitable for various applications. However, it’s crucial to choose the right switch according to specific requirements, considering factors like shape, size, actuation force, and lifecycle.

Of course, in addition to this metal domes can also be realised for customised needs. The picture below shows you a customised metal dome.

Learn more about membrane switches.