Round Shape Metal Dome With Dimple is a momentary switch contact that becomes a normally open switch when used with printed circuit boards, flexible circuits, or thin films. They are placed on a printed circuit board by applying a transparent film.
In a stationary state, the tactile metal spring contacts the outer edge of the main solder pad. When briefly pressed, they come into contact and make contact with the secondary path, thus closing the circuit. Many different shapes and strengths can be used to suit your specific application. You can use them as mechanical switches, electrical contacts, tactile switches.
Round Metal Domes are typically small with one contact point, while larger ones have five contact points. Round pot-shaped switches are low-travel pot-shaped buttons with a smooth feel and no distinct clicking sound. Round metal domes are typically used in conjunction with double-layer pot-shaped switch stickers. Currently, most smartphones utilize round metal domes. The advantages of this design include faster response times due to the shorter travel distance, a more premium feel without the clicking sound, and a shape that better complements the use of double-layer stickers, thereby more effectively saving space that cannot be compensated for.
The surfaces of commonly used metal domes can be treated with tin plating, gold plating, silver plating, nickel plating, etc., to increase surface gloss and corrosion and oxidation resistance. Metal domes are custom-made products and do not have fixed shapes or sizes.
Round Shape Metal Dome With Dimple Feature
Shape:round
Diameter:3-20mm
Force:100-600gf
Surface plated:gold, silver, nickle
How To Select Round Shape Metal Dome?
Light force (100gf-150gf): Suitable for scenarios requiring frequent pressing, such as mobile phone side buttons and Bluetooth headset controls, offering reduced fatigue during prolonged use.
Medium force (160gf-220gf): The most versatile option, ideal for everyday appliances like remote controls and microwave panels, balancing tactile feedback with protection against accidental presses.
Heavy Force (230gf–280gf): Suitable for scenarios requiring accidental touch prevention, such as automotive dashboard buttons and industrial equipment controls, necessitating deliberate pressure to activate.
Material Selection: Prioritise SUS301 stainless steel for optimal elasticity and fatigue resistance, offering a lifespan of 1–2 million cycles. Cost-sensitive applications may utilise phosphor bronze, offering a lifespan of approximately 500,000 to 1,000,000 cycles.
Surface treatment selection:
For humid or highly corrosive environments (e.g., kitchen appliances), opt for gold or silver plating to enhance oxidation resistance.
In dry, ambient-temperature conditions (e.g., remote controls), nickel plating provides superior cost-effectiveness.
