N73 metal dome

1:N73 metal dome switch contacts structural drawing 2:N73 metal dome This type is somehow similar to single layer type by means of metal dome contacts attached under Maylar. But the difference is that, in this type, the Spacer is attached under the metal dome contacts. Air paths which function like air holes in single-layer, helps provide good click-feeling when dome contacts are pressed. Besides this effect, air paths help reduce the chance for PET film being damaged by metal dome contacts' burr and block dust coming into PET films. FPC membrane switch We can supply different sizes and variations of metal domes, and has extensive experience in metal dome array applications to assist in optimizing designs for every requirement. PRODUCTS:Metal dome array\METAL DOMETechnical Parameter:Size:Diameter from4.5 mm,20Keyslife cycles:>1millionScope of Elasticity:From 130gf to 350gf is availableTravel:0.15 to 0.3mmResistance:<3 ohmStorage Temperature\ Humidity:-55 +85°C \0 +80%Salt and Fog Examination:V35±2°C, 5±0.1%,48H.MYLAR initial force test:4↑(Unit:No/Ball)MYLAR retention test:8↑(Unit:hr/kg*inch)MYLAR adhesion test:0.6↑(Unit:kgf/inch)MYLAR shrinkage:MD(%):0.5 ↓ CD(%):0.3 ↓(Unit:100°C*40mins)Certify:SGS,RoHS,VOA