Membrane switches

GMN provides complete user interface custom manufacturing, design and engineering support, and sub-assembly for membrane switch panels. Versatile and economical, membrane switches are ideal for industries such as medical and industrial equipment because they are easy to clean with no moisture ingress. They also offer thin design options coupled with nearly endless membrane keypad configurations.

Membrane switch technology advantages

The simple, low-profile switch panel fabrication offers a custom interface at an economical price point. Other benefits consist of:

  • Long life
  • Easy cleaning
  • Low profile and tactile response options
  • Resistance to moisture, chemicals, abrasion
  • Easier integration or retrofit with existing controllers

Membrane switch design options

A wide range of cost-effective design options make membrane switches an ideal choice for a variety of applications. Options include:

  • Display windows
  • Embossed or re-legendable overlay
  • Multiple overlay versions, single switch design
  • ESD/EMI shielding
  • Custom backlighting
  • Rigid subpanel or printed circuit board (PCB), which doubles as subpanel

Construction & specifications

A membrane switch is a micro-motion, momentary contact, flexible circuit with a printed graphic overlay. These interfaces are normally screen-printed on thin polyester using silver or carbon conductive ink. Metal domes are integrated to provide tactile feedback.

Specifications Typical values
Actuation force Non-tactile: 85g to 285g, tactile: 100g to 700g
Switch height Non-tactile: 0.007" to 0.011", tactile: 0.012" to 0.040"
Panel thickness 0.025" to 0.035"
Life cycle 1,000,000 actuations
Operating voltage 1VDC min. 30VDC max. 15 VRMS max.
Operating current 250 mW maximum
Closed circuit resistance 100 ohms maximum
Open circuit resistance 10 Mohms minimum
Contact disturbance time 20 ms maximum
Capacitance <500 pF
Static 10k VDC minimum
Isolation 1k VDC for 1 second
Dielectric ink withstand 1kVDC between adjacent traces
Dielectric substrate material 11kVDC/per mil in thickness
Operational temperature -30C to +65C
Storage temperature -40C to +80C
Moisture 5% to 95% relative humidity, non-condensing.
EMI/RFI shielding Available