... . ours is based on high quality and competitive price Keyboard SwitchMembrane switches is a type of keypad, which can ... early 1980.1)Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane faceplate ... circuit rating——35V DC, 100mA, 1Wb) Contact resistance——10 - 500Ωc) Insulation resistance——100mΩ at 100V DCd) Dielectric withstand——250V ...