Elastomer keypads

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 provide you with keypad solutions that deliver 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. 

Specifications Typical values
Switch travel 0.040" - 0.050" typical
Actuation force 100g 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 colors Match within +/- 0.5 any pantone shade
Life cycle 1,000,000 actuations
Material hardness  40 - 80 shore A (55 typical)

Dimension (L)

IN (mm)

L <= 1.575"

1.575" < L <= 1.969" 

1.969" < L <=3.937"

L > 3.937"

Angles

Standard tolerance

IN (mm)

+/- 0.010" (0.25)

+/- 0.014" (0.35)

+/- 0.020" (0.50)

+/- 1.0%

+/- 1.0 degrees

Contact rating 100ma @ 24VDC/0.5s
Breakdown voltage 14KV/mm
Contact bounce <12ms
Contact resistance (Conductive puck) <100 ohms 
Insulation resistance >100 Mohms @ 500 VDC
Operational temperature -30° C to +80°C
Storage temperature -40° C to +85°C