Keystone Metal Key-Pad Domes：

Tactile "Key-Pad" Dome Switches

 

Snap action dome switches

 

"Key-Pad" Domes are ideal for Keypad arrays that require long life or a sealed interface.  These snap action switches provide positive feedback with an audible and tactile click.  "Key-Pad" domes are made from nickel plated stainless steel which provides a very reliable user interface (over one million cycles).  "Key-Pad" domes can be placed directly to a PCB which will save on assembly cost and increase reliability.  Available on tape and reel for automated pick and place assembly applications, as well as packed stacked in tubes.  For pack stacked in tubes, the contour of the dome keeps an air pocket in between each dome. The air pocket allows only one dome to be picked off the stack eliminating double stacked domes.

 

The "Key-Pad" dome is designed to be placed on the PCB, not soldered.  The domes are held in place by using a "Key-Pad" adhesive spacer (P/N 5200) which requires cut outs to be added in the proper locations.  If the top sealing surface has an adhesive bottom side, it will help to keep the dome in the proper location (optional).

 

The low profile of the dome is ideal for thin, lightweight applications or applications that need to be sealed or easily cleaned.  The domes  can be activated from finger pressure thru a thin flexible membrane that can be sealed against the product chassis so cleaning fluids, dust or weather will not damage the circuitry.

 

If the devise has a thicker or sculpted exterior package, the dome can be activated with an actuator.   The actuator will give the "Key-Pad"  dome a more conventional push button feel. 

A "Key-Pad" Dome is available for almost any application with trip forces ranging from 8 oz. to 14 oz. and dome diameters from 8.4mm to 12.2mm.   Trip forces are consistent from switch to switch per batch.   This insures that a switch array will have a consistent feel from switch to switch.  "Key-Pad" domes have a large sweet spot which allows the dome to be easily activated even though it was pushed off center.  Gold plated domes are available upon request.

 

Specifications:

Material:  Stainless Steel, Nickel Plated.

Gold plating available

Operating Temperature: -40°F to  220°F [-40°C to 105°C]

Storage Temperature:  -67°F to 257°F  [-55°C to 125°C] 

Electrical:

Contact resistance: less then 100 mOhm

Switching Voltage:  0.1 to 100VDC

Switching Current: 5 µAmp to 100 mAmp DC

Switching Capacity: 1 Watt

Available in three different diameter series: Mini (8.4mm), Compact (10.0mm) and Maxi (12.2mm)