Coconut Round Metal Dome

The Rectangular Metal Dome is also known as the irregular metal dome button. The size of the irregular pot piece button is 25.4 * 12.8mm, which is a much larger switch button than ordinary  metal dome.

Coconut Round Metal Dome: Suitable for virtually any application requiring circular metal domes, their shape is achieved by trimming portions from both sides of a circular metal dome to form a regular waisted profile. This design excels when spatial constraints in one direction preclude the use of a standard circular metal dome. Waisted metal domes (elliptical metal domes) also offer excellent tactile feedback.

Shape:Coconut Round

Diameter:12.7*25.4mm, 38.1*12.8mm etc.

Force:100-500gf

Surface plated:gold, silver, nickle

Application: Metal dome. is mainly used in products such as film switches, contact switches, PCB boards, FPC boards, medical devices, etc.

Shape and Customization

• A rectangular spring designed specifically for special spatial structures, with dimensions and strength customizable according to the position of the circuit board solder pads.

• Support combining with other shapes (such as circles and triangles) to form a whole conductive film, improving assembly efficiency.

Materials and processes

• Made of stainless steel material (thickness 0.05mm-0.1mm) with a hardness of HV480-550, ensuring high resilience and durability.

• The surface can be plated with nickel, silver, or gold to enhance conductivity and corrosion resistance, adapting to the needs of different grades of products.

Functional performance

• When pressed, the concave conductive circuit at the center point provides clear tactile feedback (click sensation) and stable rebound.

• With a lifespan of up to 1 million presses, it is suitable for high-frequency switch scenarios such as fitness equipment buttons and industrial equipment control boards.

Due to their large size, irregular metal dome can only be used on single button products or multiple separate button products. They can generally be used on buttons, car horn buttons, turntables, SMT surface mount machines, automatic cutting and conversion machines, large craft lighting control switches, and various fire and anti-theft system buttons on children's toy cars.

• High-frequency use products (e.g., mobile phone keypads, computer keyboards, industrial instruments): Prioritise premium-grade products with a lifespan ≥1 million cycles. Materials should be SUS301 stainless steel or phosphor bronze, with gold/silver plating applied to enhance wear resistance and conductivity.

• Medium-frequency products (e.g., home appliance remote controls, standard digital devices): Opt for standard-grade products with a lifespan of 500,000 to 1 million cycles. SUS304 stainless steel with nickel plating adequately meets requirements, balancing cost and reliability.

• Low-frequency applications (e.g., children's toys, basic doorbells): Standard-grade products with a lifespan of 200,000 to 500,000 cycles may be selected. Thin-gauge (0.05–0.08mm) stainless steel suffices, prioritising cost control.

• Humid/outdoor environments (e.g., smart locks, outdoor sensors): Select gold-plated or silver-plated dome switches to enhance corrosion resistance and prevent oxidation from affecting conductivity.

• High-temperature environments (e.g., automotive electronics, industrial equipment): Opt for high-temperature-resistant stainless steel paired with heat-resistant PET adhesive to ensure stable performance between -55°C and 125°C.

• Dusty environments (e.g., robotic vacuum cleaners, outdoor controllers): Prioritise double-layer dome switches where the spacer prevents dust ingress, safeguarding the spring plate's rebound performance.