... the electric equipment; good quantity & service; RoHS material; switch boardMembrane switches is a type of keypad, which can be ... and parts began early 1980.1)Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane ... 500Ωc) Insulation resistance——100mΩ at 100V DCd) Dielectric withstand——250V Rms (50 - 60Hz 1min)e) Contact bounce——5ms or ...