Circuit Transparent Keys Led Clear Window Membrane Switch:
1. Type of membrane switch:
Main types: There are many different types and layouts of membrane switch, its basic function like travel, operating force, life time mainly depend on type of key and material. The main types can be sorted as follows:
Membrane switch with flat keys, membrane switch with embossed keys (rectangle or dome), membrane switch with metal dome or polydome, tactile or non-tactile, membrane switch with LCD window or embedded LED, and so on...
2. Metal dome keypad: It has metal domes inside, with contacts above them, the electric loop is generated by finger operating.
Advantage:
1) Good tactile feeling.
2) Long lifetime even being used in high temperature condition.
3) Widely used in industrial control, electronics, household appliance.
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Technical Specification Of Membrane Swithc |
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wire lead resistance: |
<1Ω/CM |
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Life time: |
>1 Million times |
rated current: |
25-100mA,0~30V DC |
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Operation Temperature: |
-104°F~158°F |
Rated Voltage: |
<50V, DC |
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Operation Humidity: |
at104°F,<98%RH |
Insulation resistance: |
<100MΩ,250V DC |
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Dome springback time: |
<5 msec |
Switch travel: |
Flat Type 0.05-0.3mm |
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Base Material voltage withstand: |
1500 V DC |
tactile type:0.3-1.5mm |
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Tail flexiblility: |
any angle within 180 degree |