|
|
 |
Button Travel (mm)
 |
Typical Effects
 |
Note: For good tactile feel a travel of 1.2 mm
and a force of 135 grams is recommended. |
Above effects are estimated according
to typical key structures. |
Silicone Rubber Keypad - General Specifications
| Travel |
0.8 - 1.5 mm |
| Force |
60 - 300 grams |
| Tactile Response |
Yes |
| Life Cycles |
1,000,000 |
| Operating Temperature |
-40° to + 150° C |
| Storage Temperature |
-50° to + 170° C |
| Dielectric Strength |
>1 min @ 500 VRMS |
| ESD Breakdown |
20KV/MM |
| Contact Bounce |
<5MS |
| Contact Resistance |
<200 Ohms |
|
Physical Properties of Silicone Rubber
| Typical Physical Property |
Carbon Conductor |
Silicone Insulator |
| Specific Gravity@ 72° C |
1.18 |
1.17 |
| Durometer Hardness (Shore A) |
65 ± 5 |
30-80 ± 5 |
| Tensile Strength (KG/CM) |
>50 |
>70 |
| Elongation (%) |
>100 |
>250 |
| Tear Strength (KG/CM |
>9 |
>12 |
| Linear Shrinkage (%) |
3 - 5 |
3 -4.5 |
| Volume Resistivity (Ohm/CM) |
<5 |
1x1015 |
|
Dimensional Tolerances
| Dimension |
Tolerances |
| Inches |
MM |
Inches |
MM |
| 0 - .987 |
0 - 25 |
.005 |
.13 |
| .998 - 1.460 |
25.1 - 37 |
.008 |
.20 |
| 1.461 - 1.971 |
37.1 - 50 |
.010 |
.25 |
| 1.972 - 2.444 |
50. - 1-62 |
.012 |
.31 |
| 2.445 - 2.956 |
62.1 - 75 |
.015 |
.38 |
| 2.957 - 3.428 |
75.1 - 87 |
.017 |
44 |
| 3.429 - 3.940 |
87.1 - 100 |
.020 |
.50 |
| 3.491 - 5.908 |
100.1 - 150 |
.024 |
.62 |
| 5.909 - OVER |
150.1 - OVER |
0.5% |
0.5% |
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