Elastomer keypads

Elastomer keypad with circuit board
Elastomer keypad with circuit board

Elastomer keypads offer a high profile, tactile feel with an underlying switch layer. Reliable and durable, GMN’s elastomer keypads are an excellent choice when three-dimensional keys are needed in high moisture environments such as marine or military settings. Our dedicated engineers can help you select the keypad solution that delivers the right look, feedback and cost for your needs. 

Elastomer keypad advantages

When you need a switch with high-tactile feel and customizable feedback, elastomer keypads are an ideal choice. Benefits include: 

  • Lightweight
  • Sealed surface
  • Simulates full travel of tactile keypad
  • Array of color options
  • Optimal light diffusion
  • Overall or selective backlighting
  • May be combined with other switch types
  • One-piece construction that simplifies assembly and tooling
  • Cost-effective tooling

Design options

Keypads provide excellent performance in a wide variety of conditions and offer several design options to fit your needs:

  • Plastic or metal bezel
  • Display windows
  • Multicolors and custom color
  • Durometer variance
  • Printed, laser etched and/or backlit legends and icons 

Construction & specifications

The switching layer underneath the elastomer keypad may be a flexible membrane circuit or a rigid printed circuit board. The shorting mechanism may be either a carbon pill molded into the keypad or a metal dome assembled under the keypad. 

SpecificationsDetails
Switch travel0.040" - 0.050" typical
Actuation force100g to 300g
Legend life

No breaks in graphic lines after a minimum four continuous cycles on Norman tool abrasion test equipment with 175 grams of force on paper that has been baked at 50C for four hours.

Mold colorsMatch within +/- 0.5 any pantone shade
Life cycle1,000,000 actuations
Material hardness 40 - 80 shore A (55 typical)
Dimensional tolerance

L <= 1.575": +/- 0.010" 1.575" <

L <= 1.969": +/- 0.014” 1.969" <

L <=3.937": +/- 0.020"

L > 3.937": +/- 1.0%

angles: +/- 1.0 degrees

Contact rating100ma @ 24VDC/0.5s
Breakdown voltage14KV/mm
Contact bounce<12ms
Contact resistance(conductive puck) <100 ohms 
Insulation resistance>100Mohms @500VDC
Operational temperature-30° C to +80°C
Storage temperature-40° C to +85°C