... and parts began early 1980.1)Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane faceplate ... a) Maximum circuit rating——35V DC, 100mA, 1Wb) Contact resistance——10 - 500Ωc) Insulation resistance——100mΩ at 100V DCd) Dielectric ... - 95% (40°C) for 240hrs9)Thickness——between 0.9mm-2mm 10)Package——sheet in foam bag and in carton box;11 ...