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Membrane switches is a type of keypad, which can be touched lightly. It integrates switch key, membrane panel, marker, symbol, display functions and plate, as a new type electronic components and parts began early 1980. 1,Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane faceplate for variety electronic industries. 2,Material——available in Polyester (PET) or Polycarbonate (PC).In experience we are suggest that PET is the best choice. 3,Surface——gloss & smooth ,velvet,matte & coarse finish, semi-gloss with semi-laminate. 4,Embossing——Dome above the circuit layer, it can be metal(stainless steel) dome 5,Circuit layer——Available with LEDs in a variety of colors and standard male/female connectors 6,Adhesive——many brand for your choice: 3M, SONY, COCKTAILS, FOURPILLARS and so on 7,Feature & performance: a) Maximum circuit rating——35V DC, 100mA, 1W b) Contact resistance——10 - 500Ω c) Insulation resistance——100mΩ at 100V DC d) Dielectric withstand——250V Rms (50 - 60Hz 1min) As a manufacturer, we can ensure the material quality, deliery time, and stable prices for the products.