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Technic >> Membrane switch

 

 

Standard structure:

Overlay material:

Item

PET

PC

PVC

Silicone

Life-time of bending

very good

good

bad

very good

Corrosion resistance

good

good

very good

good

Wear resistance

very good

very good

bad

good

Insulation

good

normal

very good

very good

Transparence

very good

very good

normal

bad

Temperature level

good

good

normal

good

UV resistance

bad

bad

normal

bad

Circuit layer:

There are 2 different material, FPC (Flexible Printed Circuit) and PET membrane circuit. PET membrane circuit is widely used for membrane switches because of its lower cost and good performance. If there are some SMD components and circuit is complex, it is better to select FPC.

Membrane switch standard specification:

Electrical

Maximum Circuit Rating

35VDC, 100mA, 1W

Contact Resistance

10Ω~ 500Ω

Insulation Resistance

100MΩ at 100VDC

Dielectric Withstand

250Rms (50~60Hz per min)

Contact Bounce

<5ms

Mechanical

Actuation Force

a) Flat type 60 ~ 300g (2 ~ 10oz.)
b) Tactile type: 150 ~ 400g (6 ~ 14oz.)

Switch Stroke

a) Flat type 0.1 ~ 0.5mm
b) Tactile type: 0.6 ~ 1.5mm

Cable pitch

2.54mm, 2.50mm, 1.27mm, 1.25mm

Tolerance

+/- 0.2mm

Environment

Operating Temperature

-20℃ ~ +70℃

Storage Temperature

-40℃ ~ +80℃

Humidity

40℃, 90% ~ 95% for 240 hours

Life expectancy

a) Flat type: 5,000,000 closures or more
b) Tactile type: 1,000,000 closures or more

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kenmasteryu@hotmail.com

 

 

 

 

 

Address: Xixiang, Second Industrial Zone Village, Baoan District, Shenzhen, Guangdong China
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