Circular dome switches serve as core tactile components primarily utilised in membrane switches, pushbutton switches, and dome arrays. Hongmao's circular dome switches are precision-stamped from premium SUS301 stainless steel. Their specially curved surface design produces a crisp clicking sound upon actuation while ensuring reliable electrical conductivity. Common diameter specifications range from 3 to 20mm, with actuation force customisable to suit diverse application requirements (e.g., within the 100-600gf range).
Circle Metal Dome Substrate Types:
Stainless Steel (SUS301/304): High elasticity, fatigue resistance, low cost, suitable for most consumer electronics.
Beryllium Copper (BeCu): Higher elastic modulus, suitable for small dimensions and high-frequency operation scenarios (e.g., camera shutter buttons).
Titanium Alloy: Lightweight, corrosion-resistant, used in high-end wearable devices (e.g., smartwatch buttons).
tactile metal domes Surface Plating:
Silver Plating (Ag): High conductivity, suitable for signal transmission applications (e.g., keyboard contacts), requires anti-sulfurization treatment.
Gold Plating (Au): Strong corrosion resistance, used in high-reliability devices (medical, military), but higher cost.
Nickel plating (Ni): An economical solution that sacrifices some conductivity to reduce costs (e.g., remote control buttons).
Features of Tactile Round Metal Dome
Highly Consistent Tactile Feedback
Circular structure ensures even force distribution for stable, reliable tactile response.
Premium Materials
Crafted from high-elasticity SUS301 stainless steel, offering exceptional resilience and wear resistance. Available in multiple sizes: minimum diameter 3.0mm to standard 20.0mm, accommodating diverse keypad layouts.
Extended Service Life
Cyclic endurance exceeding 500,000 to 1,000,000 actuations, meeting long-term operational requirements.
Customisable Surface Finishes
Gold-plating, nickel-plating and other coating options enhance conductivity and corrosion resistance.
Compatible with Dome Arrays
Suitable for standalone use or integration into adhesive-backed dome array modules.
Advantages of Circle Metal Dome
Enhanced End-User Experience
Delivers clear, responsive tactile feedback, improving user control.
Reduced Risk of Contact Failure
Reliable conductivity minimises signal delay.
Compatibility with Multiple Industry Standards
Diverse diameter specifications facilitate adaptation to existing product structures.
OEM/ODM Support
Hongmao offers bespoke dimensions, actuation forces and surface treatments, effectively shortening development cycles.
Applications of Metal Dome
Membrane Switch Panels
Operating panels for domestic appliances, measuring equipment, and industrial machinery
Remote Controls
Remote controls for televisions, set-top boxes, and multimedia devices
Communication Terminals
Point-of-sale terminals, walkie-talkies, industrial data terminals
Medical Equipment
Portable monitors, diagnostic instrument control panels
Consumer Electronics
Gaming controllers, camera controls, smart home controllers
Dome Arrays
Widely employed in PCB or PET adhesive-backed arrays
