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Capacitive keypads for mass production
2008-09-15

SMT Silicone Key is now available in a capacitive version

[ Read more... ]
 

Contact pill

The contact pill closes the contact on the PCB when key is pressed:

 

 


Following contact pills can be selected:
Pill Type Contact Resistence

Switching Voltage

Max.

Current

Max.

Power

Max.

Pill Diam.
0 no Pill no contact**** -- -- -- --
1 Carbon < 100 Ohm* 12 V 20 mA 0.25 W 2.5 mm
2 SC-L < 1.5 Ohm ** 12 V 20 mA 0.25 W 2.5 mm
3 SC-M < 1.5 Ohm *** 12 V 300 mA 3.60 W 2.5 mm

* at 1.5 N compression of carbon pill

** at 0.5 N compression of SC-L pill

*** at 0.3 N compression of SC-M pill

**** in combination with capacitive silicone, key can be used as a conductive spring/capacitive connector 

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Dust: SMT Silicone Key is not a sealed contact system, therefore dust and humidity can get between contact pill and PCB. SC-Pills are currently the best contact technology in the market as they are very robust against contamination and humidity. Additional information on Abatek's SC-Pill performance is available on request. We insist that you test your entire system to your requirement as Abatek does not take overall systems responsibility.

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Characteristics SC-Technology (SC-L and SC-M):

- Resistance < 1 Ohm with soft surface (with a diam. of 3.0 mm)
- Robust switching through distinctive voltage drop when pill hits PCB
- Robust against dust and other dirt
- Robust in humid environments
- Robust for rotation actuation (soft and flexible surface)

 

 PATENT PENDING

 

 

 
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