Electronic characteristics

Circuit rating

35V(DC),100mA,1 W

Contact resistance

10Ω - 500Ω(According the trace length and materials to confirm) 

Insulation resistance

>100MΩ 250V(DC)

Contact bounc

≤5ms

Dielectric withstand

250VRms(50 - 60Hz1 min)

Life expectancy

flat type≥500 million times,tactile type:≥1001 million times

Mechanical Properties

Operating pressure

flat type 57-284g (2-10 Oz),tactile type 170-397g (6-14 Oz) 

Switch stroke

flat type 0.1 - 0.5mm,tactile type 0.6 - 1.5mm

Environmental parameters

Operating Temperature

-20°C - +80°C

Storage temperature

-40°C - +85°C

Humidity

40°C,90%-95%,240 hours

What is membrane switch?

A membrane switch is a momentary electrical on/off switch for activating and de-activating a

circuit. Whereas a mechanical switch is usually made of copper and plastic parts, a

membrane switch circuit is printed on a heat-stabilized polyester or Indium tin oxide (ITO)using

a  copper-silver- or graphite/silver ink to lend conductivity.

The simplest membrane switch consists of 6 layers:

1. The top graphics panel, a Polyester or Polycarbonate layer with a printed or embossed button pattern
2. Spacer or dome retainer
3. PET with printed circuit layer
4. Spacer
5. PET with printed circuit layer
6. Adhesive backing with liner

What types of Membrane Switches are available?

Tactile membrane switch:

Tactile membrane switch including metal dome membrane switch and poly dome membrane switch.

Flat type membrane switch:

The graphic overlay part of this type of membrane switch is non-tactile. There is no embossing effect on it.

Backlighting membrane switch:

The option is using Light Emitting Diodes (LEDs) to back light. However, LEDs create bright spots and are

not suitable for overall back lighting of a panel, but rather as indicator lights. LEDs can either be surface-

mounted to the circuit layer or be placed on a separate LED layer