The custom membrane switches’ shape and size of all rubber switches can be designed so that almost any actuation force and tactile feel can be realized. Most applications require positive tactile feel with relatively long life. An actuation force of approximately 125 – 150 grams is typically recommended with an accompanying snap ratio of approximately 40% – 60%.
Design Force (grams) – Custom membrane switches Tolerance (+/-)
50g +/- 15 g
75g +/- 20 g
100g +/- 25 g
125g +/- 30 g
150g +/- 35 g
175g +/- 40 g
220-250g +/- 50 g
250.1g and up 30 %
Typical custom membrane switches’ tolerance for actuation force is +/- 25 grams. Optimum actuation force for best key performance is 80 – 150 grams. Conductive rubber switches can be successfully designed and manufactured with actuation forces ranging from 20 grams to 500 grams.