This membrane switch is with 50 million closures service life.

Specifications:
Maximum circuit rating: 35V DC, 100mA, 1W
Contact resistance: 10 to 500¦¸ (varied from the trace length and material)
Insulation resistance: 100M¦¸ at 100V
Dielectric withstand: 250Vrms (50 to 60Hz/minute)
Contact bounce: 5ms or less
Tactile type actuation force: 150 to 400g (6 to 14oz)
Tactile type switch stroke: 0.6 to 1.5mm
Tactile type life expectancy: 50,000,000 closures or more
Surface hardness: 3H or more
Operating temperature: -40 to +80ºC
Storage temperature: -40 to +85ºC
Operating humidity: 90 to 95%RH (at 40ºC ) for 240 hours
OEM orders are welcome