Silicone Rubber Keypad

Silicone rubber keypad contacts or keypads are made of high elastic, nontoxic silicone rubber compounds, which are processed by compression or injection molding and curing. This results in economic and reliable keypads which ensure high productivity and useful life. Rubber keyboard also provides great convenience for integrating with the printed circuit boards in any form. The sensitivity and tactile feedback can be adjusted to satisfy the operator needs. Due to its excellent characteristics, the silicone rubber switch is utilized in various industries to satisfy cost, reliability, environmental, and ergonomic/ cosmetic styling needs.

Silicone keypads offer a superior alternate look and feel than that of traditional polyester or polycarbonate graphics. At Elcom Design, Inc., we offer a vast multitude of design options and enhancements for electrometric applications including abrasion, chemical and UV resistance; carbon pill and polyester half switch designs, screen-printed or laser etched graphics, as well as epoxy enhancements and edge gasket configurations.

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Specification of Silicone Rubber Keypad:

Contact resistance <200 Ohms
Actuation force 100 +/- 25 grams typical
Life cycle 1,000,000 typical
Contact bounce 10msec. max
Pretravel 0.20mm typical
Operation temperature -40 °C to +150 °C
Storage temperature -50 °C to +150 °C
Travel 0.8mm to 120mm typical
Material hardness 50+/- 5shore A typical

Electrical Specification of Silicone Rubber Keypad:

Insulation Resistance less than 100 M-ohm at 250V DC
Contact Resistance Conductive pills less than 200 ohms
Metal pills greater than 0.01 ohms
Maximum Contact Loading 100mA , 24V DC
Contact Material ±0.05mm
Outline Tolerance Carbon impregnated silicone rubber Gold
plated metal pill

Typical Key Structure of Silicone Rubber Keypad:

1)Key Travel 0.25 ~5.0mm.
2)Actuation Force 20 ~ 350 grams
3)Operating Life 1 million (typical), 10 millions (special)
4)Operating Temperature -30°C/font>C ~ 150°C/font>C
5)Storage Temperature -42°C/font>C ~ 175°C/font>C
6)Printing Range Slope +/- 0.5 mm

Dimension Tolerance of Silicone Rubber Keypad:

6.50mm or Less +/- 0.15mm
6.50mm - 10.0mm or Less +/- 0.20mm
10.0mm - 16.0mm or Less +/- 0.20mm
16.0mm - 25.0mm or Less +/- 0.25mm
25.0mm - 40.0mm or Less +/- 0.35mm
40.0mm - 63.0mm or Less +/- 0.40mm
63.0mm - 100.0mm or Less +/- 0.55mm
100.0mm - 160.0mm or Less +/- 0.70mm
160.0mm and up +/- 0.5%

Actuation Force Tolerance of Silicone Rubber Keypad:

50 grams +/- 15 grams
75 grams +/- 20 grams
100 grams +/- 25 grams
125 grams +/- 30 grams
150 grams +/- 35 grams
140 grams +/- 40 grams
> 200grams +/- 30 %