|
  
 
|
 |
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% |
|
|
 |
